56161538 has 8 divisors (see below), whose sum is σ = 87905088. Its totient is φ = 26859844.

The previous prime is 56161537. The next prime is 56161543. The reversal of 56161538 is 83516165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56161498 and 56161507.

It is not an unprimeable number, because it can be changed into a prime (56161531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610406 + ... + 610497.

It is an arithmetic number, because the mean of its divisors is an integer number (10988136).

Almost surely, 2^56161538 is an apocalyptic number.

56161538 is a deficient number, since it is larger than the sum of its proper divisors (31743550).

56161538 is a wasteful number, since it uses less digits than its factorization.

56161538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220928.

The product of its digits is 21600, while the sum is 35.

The square root of 56161538 is about 7494.1002128341. The cubic root of 56161538 is about 382.9537537300.

The spelling of 56161538 in words is "fifty-six million, one hundred sixty-one thousand, five hundred thirty-eight".