56355531 has 4 divisors (see below), whose sum is σ = 75140712. Its totient is φ = 37570352.

The previous prime is 56355517. The next prime is 56355547. The reversal of 56355531 is 13555365.

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

It is a cyclic number.

It is not a de Polignac number, because 56355531 - 2¹¹ = 56353483 is a prime.

It is a super-2 number, since 2×56355531² = 6351891748583922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56355492 and 56355501.

It is not an unprimeable number, because it can be changed into a prime (56355571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9392586 + ... + 9392591.

It is an arithmetic number, because the mean of its divisors is an integer number (18785178).

Almost surely, 2^56355531 is an apocalyptic number.

56355531 is a deficient number, since it is larger than the sum of its proper divisors (18785181).

56355531 is a wasteful number, since it uses less digits than its factorization.

56355531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18785180.

The product of its digits is 33750, while the sum is 33.

The square root of 56355531 is about 7507.0321033015. The cubic root of 56355531 is about 383.3941795454.

It can be divided in two parts, 5 and 6355531, that added together give a palindrome (6355536).

The spelling of 56355531 in words is "fifty-six million, three hundred fifty-five thousand, five hundred thirty-one".