56189261 has 6 divisors (see below), whose sum is σ = 57528270. Its totient is φ = 54880728.

The previous prime is 56189239. The next prime is 56189279. The reversal of 56189261 is 16298165.

56189261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 51566761 + 4622500 = 7181^2 + 2150^2 .

It is a de Polignac number, because none of the positive numbers 2^k-56189261 is a prime.

It is a super-2 number, since 2×56189261² = 6314466103452242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56189291) 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 5 ways as a sum of consecutive naturals, for example, 13346 + ... + 17043.

It is an arithmetic number, because the mean of its divisors is an integer number (9588045).

Almost surely, 2^56189261 is an apocalyptic number.

It is an amenable number.

56189261 is a deficient number, since it is larger than the sum of its proper divisors (1339009).

56189261 is an equidigital number, since it uses as much as digits as its factorization.

56189261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30475 (or 30432 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 56189261 is about 7495.9496396387. The cubic root of 56189261 is about 383.0167558063.

The spelling of 56189261 in words is "fifty-six million, one hundred eighty-nine thousand, two hundred sixty-one".