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211141421 = 1931093997
BaseRepresentation
bin11001001010111…
…00001100101101
3112201022002120122
430211130030231
5413023011141
632541254325
75142446441
oct1445341455
9481262518
10211141421
11a9202747
125a8643a5
133498856a
1420082821
151380a64b
hexc95c32d

211141421 has 4 divisors (see below), whose sum is σ = 212235612. Its totient is φ = 210047232.

The previous prime is 211141379. The next prime is 211141423. The reversal of 211141421 is 124141112.

211141421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88153321 + 122988100 = 9389^2 + 11090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-211141421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211141421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211141423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546806 + ... + 547191.

It is an arithmetic number, because the mean of its divisors is an integer number (53058903).

Almost surely, 2211141421 is an apocalyptic number.

It is an amenable number.

211141421 is a deficient number, since it is larger than the sum of its proper divisors (1094191).

211141421 is a wasteful number, since it uses less digits than its factorization.

211141421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094190.

The product of its digits is 64, while the sum is 17.

The square root of 211141421 is about 14530.7061425108. The cubic root of 211141421 is about 595.4671575421.

Adding to 211141421 its reverse (124141112), we get a palindrome (335282533).

The spelling of 211141421 in words is "two hundred eleven million, one hundred forty-one thousand, four hundred twenty-one".

Divisors: 1 193 1093997 211141421