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2135221 = 11389499
BaseRepresentation
bin1000001001010010110101
311000110222021
420021102311
51021311341
6113433141
724102064
oct10112265
94013867
102135221
111229250
1286b7b1
13599b5a
143d81db
152c29d1
hex2094b5

2135221 has 8 divisors (see below), whose sum is σ = 2340000. Its totient is φ = 1932240.

The previous prime is 2135219. The next prime is 2135227. The reversal of 2135221 is 1225312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2135221 - 21 = 2135219 is a prime.

It is a Duffinian number.

2135221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2135195 and 2135204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4030 + ... + 4528.

It is an arithmetic number, because the mean of its divisors is an integer number (292500).

22135221 is an apocalyptic number.

It is an amenable number.

2135221 is a deficient number, since it is larger than the sum of its proper divisors (204779).

2135221 is a wasteful number, since it uses less digits than its factorization.

2135221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899.

The product of its digits is 120, while the sum is 16.

The square root of 2135221 is about 1461.2395423065. The cubic root of 2135221 is about 128.7698759650.

Subtracting from 2135221 its reverse (1225312), we obtain a palindrome (909909).

The spelling of 2135221 in words is "two million, one hundred thirty-five thousand, two hundred twenty-one".

Divisors: 1 11 389 499 4279 5489 194111 2135221