211454421 has 4 divisors (see below), whose sum is σ = 281939232. Its totient is φ = 140969612.

The previous prime is 211454389. The next prime is 211454443. The reversal of 211454421 is 124454112.

211454421 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211454421 - 2⁵ = 211454389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211454391 and 211454400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211454491) 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, 35242401 + ... + 35242406.

It is an arithmetic number, because the mean of its divisors is an integer number (70484808).

Almost surely, 2^211454421 is an apocalyptic number.

It is an amenable number.

211454421 is a deficient number, since it is larger than the sum of its proper divisors (70484811).

211454421 is an equidigital number, since it uses as much as digits as its factorization.

211454421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70484810.

The product of its digits is 1280, while the sum is 24.

The square root of 211454421 is about 14541.4724495149. The cubic root of 211454421 is about 595.7612561559.

The spelling of 211454421 in words is "two hundred eleven million, four hundred fifty-four thousand, four hundred twenty-one".