56133561 has 8 divisors (see below), whose sum is σ = 81648864. Its totient is φ = 34020320.

The previous prime is 56133527. The next prime is 56133587. The reversal of 56133561 is 16533165.

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

It is a cyclic number.

It is not a de Polignac number, because 56133561 - 2¹⁹ = 55609273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56133521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850476 + ... + 850541.

It is an arithmetic number, because the mean of its divisors is an integer number (10206108).

Almost surely, 2^56133561 is an apocalyptic number.

It is an amenable number.

56133561 is a deficient number, since it is larger than the sum of its proper divisors (25515303).

56133561 is a wasteful number, since it uses less digits than its factorization.

56133561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701031.

The product of its digits is 8100, while the sum is 30.

The square root of 56133561 is about 7492.2333786395. The cubic root of 56133561 is about 382.8901534020.

The spelling of 56133561 in words is "fifty-six million, one hundred thirty-three thousand, five hundred sixty-one".