56542521 has 16 divisors (see below), whose sum is σ = 87920000. Its totient is φ = 32309424.

The previous prime is 56542513. The next prime is 56542523. The reversal of 56542521 is 12524565.

It is not a de Polignac number, because 56542521 - 2³ = 56542513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56542523) 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, 26446 + ... + 28503.

It is an arithmetic number, because the mean of its divisors is an integer number (5495000).

Almost surely, 2^56542521 is an apocalyptic number.

It is an amenable number.

56542521 is a deficient number, since it is larger than the sum of its proper divisors (31377479).

56542521 is an equidigital number, since it uses as much as digits as its factorization.

56542521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54973 (or 54959 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 56542521 is about 7519.4761120706. The cubic root of 56542521 is about 383.8177507021.

The spelling of 56542521 in words is "fifty-six million, five hundred forty-two thousand, five hundred twenty-one".