56449521 has 16 divisors (see below), whose sum is σ = 87265920. Its totient is φ = 35996400.

The previous prime is 56449517. The next prime is 56449541. The reversal of 56449521 is 12594465.

56449521 is a `hidden beast` number, since 5 + 644 + 9 + 5 + 2 + 1 = 666.

It is not a de Polignac number, because 56449521 - 2² = 56449517 is a prime.

It is a super-2 number, since 2×56449521² = 6373096842258882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56449541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44830 + ... + 46071.

It is an arithmetic number, because the mean of its divisors is an integer number (5454120).

Almost surely, 2^56449521 is an apocalyptic number.

It is an amenable number.

56449521 is a deficient number, since it is larger than the sum of its proper divisors (30816399).

56449521 is a wasteful number, since it uses less digits than its factorization.

56449521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90933 (or 90927 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 56449521 is about 7513.2896257232. The cubic root of 56449521 is about 383.6072033226.

The spelling of 56449521 in words is "fifty-six million, four hundred forty-nine thousand, five hundred twenty-one".