56521230 has 32 divisors (see below), whose sum is σ = 137181600. Its totient is φ = 14902272.

The previous prime is 56521217. The next prime is 56521249. The reversal of 56521230 is 3212565.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 56521230.

It is a congruent number.

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, 7915 + ... + 13254.

It is an arithmetic number, because the mean of its divisors is an integer number (4286925).

Almost surely, 2^56521230 is an apocalyptic number.

56521230 is an abundant number, since it is smaller than the sum of its proper divisors (80660370).

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

56521230 is a wasteful number, since it uses less digits than its factorization.

56521230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21268.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 56521230 is about 7518.0602551456. The cubic root of 56521230 is about 383.7695693246.

Adding to 56521230 its reverse (3212565), we get a palindrome (59733795).

The spelling of 56521230 in words is "fifty-six million, five hundred twenty-one thousand, two hundred thirty".