56821534 has 32 divisors (see below), whose sum is σ = 106774272. Its totient is φ = 22032000.

The previous prime is 56821517. The next prime is 56821537. The reversal of 56821534 is 43512865.

56821534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×56821534² = 6457373452226312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56821534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56821537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36349 + ... + 37879.

It is an arithmetic number, because the mean of its divisors is an integer number (3336696).

Almost surely, 2^56821534 is an apocalyptic number.

56821534 is a deficient number, since it is larger than the sum of its proper divisors (49952738).

56821534 is a wasteful number, since it uses less digits than its factorization.

56821534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792.

The product of its digits is 28800, while the sum is 34.

The square root of 56821534 is about 7538.0059697509. The cubic root of 56821534 is about 384.4480402234.

The spelling of 56821534 in words is "fifty-six million, eight hundred twenty-one thousand, five hundred thirty-four".