56531402 has 4 divisors (see below), whose sum is σ = 84797106. Its totient is φ = 28265700.

The previous prime is 56531359. The next prime is 56531429. The reversal of 56531402 is 20413565.

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

It can be written as a sum of positive squares in only one way, i.e., 56415121 + 116281 = 7511^2 + 341^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14132849 + ... + 14132852.

Almost surely, 2^56531402 is an apocalyptic number.

56531402 is a deficient number, since it is larger than the sum of its proper divisors (28265704).

56531402 is a wasteful number, since it uses less digits than its factorization.

56531402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28265703.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 56531402 is about 7518.7367289991. The cubic root of 56531402 is about 383.7925899955.

Adding to 56531402 its reverse (20413565), we get a palindrome (76944967).

The spelling of 56531402 in words is "fifty-six million, five hundred thirty-one thousand, four hundred two".