56172534 has 32 divisors (see below), whose sum is σ = 125414784. Its totient is φ = 16625280.

The previous prime is 56172533. The next prime is 56172593. The reversal of 56172534 is 43527165.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 56172495 and 56172504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56172533) 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 15 ways as a sum of consecutive naturals, for example, 7059 + ... + 12734.

It is an arithmetic number, because the mean of its divisors is an integer number (3919212).

Almost surely, 2^56172534 is an apocalyptic number.

56172534 is an abundant number, since it is smaller than the sum of its proper divisors (69242250).

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

56172534 is a wasteful number, since it uses less digits than its factorization.

56172534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19852.

The product of its digits is 25200, while the sum is 33.

The square root of 56172534 is about 7494.8338207061. The cubic root of 56172534 is about 382.9787452386.

Adding to 56172534 its reverse (43527165), we get a palindrome (99699699).

The spelling of 56172534 in words is "fifty-six million, one hundred seventy-two thousand, five hundred thirty-four".