56897521 has 4 divisors (see below), whose sum is σ = 60244452. Its totient is φ = 53550592.

The previous prime is 56897513. The next prime is 56897573. The reversal of 56897521 is 12579865.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52403121 + 4494400 = 7239^2 + 2120^2 .

It is a cyclic number.

It is not a de Polignac number, because 56897521 - 2³ = 56897513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56897021) 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, 1673440 + ... + 1673473.

It is an arithmetic number, because the mean of its divisors is an integer number (15061113).

Almost surely, 2^56897521 is an apocalyptic number.

It is an amenable number.

56897521 is a deficient number, since it is larger than the sum of its proper divisors (3346931).

56897521 is a wasteful number, since it uses less digits than its factorization.

56897521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346930.

The product of its digits is 151200, while the sum is 43.

The square root of 56897521 is about 7543.0445444794. The cubic root of 56897521 is about 384.6193370230.

It can be divided in two parts, 568 and 97521, that added together give a palindrome (98089).

The spelling of 56897521 in words is "fifty-six million, eight hundred ninety-seven thousand, five hundred twenty-one".