21556314 has 32 divisors (see below), whose sum is σ = 51589440. Its totient is φ = 6632496.

The previous prime is 21556273. The next prime is 21556321. The reversal of 21556314 is 41365512.

21556314 is a `hidden beast` number, since 21 + 5 + 5 + 631 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14652 + ... + 16055.

It is an arithmetic number, because the mean of its divisors is an integer number (1612170).

Almost surely, 2^21556314 is an apocalyptic number.

21556314 is an abundant number, since it is smaller than the sum of its proper divisors (30033126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21556314 is a wasteful number, since it uses less digits than its factorization.

21556314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30731 (or 30725 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 21556314 is about 4642.8777713827. The cubic root of 21556314 is about 278.3074510297.

The spelling of 21556314 in words is "twenty-one million, five hundred fifty-six thousand, three hundred fourteen".