15456216 has 16 divisors (see below), whose sum is σ = 38640600. Its totient is φ = 5152064.

The previous prime is 15456211. The next prime is 15456223. The reversal of 15456216 is 61265451.

It is a super-2 number, since 2×15456216² = 477789226077312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15456211) 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, 321981 + ... + 322028.

Almost surely, 2^15456216 is an apocalyptic number.

It is an amenable number.

15456216 is an abundant number, since it is smaller than the sum of its proper divisors (23184384).

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

15456216 is a wasteful number, since it uses less digits than its factorization.

15456216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644018 (or 644014 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 15456216 is about 3931.4394310481. The cubic root of 15456216 is about 249.0965577680.

The spelling of 15456216 in words is "fifteen million, four hundred fifty-six thousand, two hundred sixteen".