56121566 has 8 divisors (see below), whose sum is σ = 84740304. Its totient is φ = 27874800.

The previous prime is 56121553. The next prime is 56121577. The reversal of 56121566 is 66512165.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92615 + ... + 93218.

It is an arithmetic number, because the mean of its divisors is an integer number (10592538).

Almost surely, 2^56121566 is an apocalyptic number.

56121566 is a deficient number, since it is larger than the sum of its proper divisors (28618738).

56121566 is a wasteful number, since it uses less digits than its factorization.

56121566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185986.

The product of its digits is 10800, while the sum is 32.

The square root of 56121566 is about 7491.4328402516. The cubic root of 56121566 is about 382.8628786043.

The spelling of 56121566 in words is "fifty-six million, one hundred twenty-one thousand, five hundred sixty-six".