56385081 has 9 divisors (see below), whose sum is σ = 81477669. Its totient is φ = 37575036.

The previous prime is 56385053. The next prime is 56385089. The reversal of 56385081 is 18058365.

The square root of 56385081 is 7509.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-56385081 is a prime.

It is a super-2 number, since 2×56385081² = 6358554718753122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56385089) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21276 + ... + 23778.

Almost surely, 2^56385081 is an apocalyptic number.

56385081 is the 7509-th square number.

56385081 is the 3755-th centered octagonal number.

It is an amenable number.

56385081 is a deficient number, since it is larger than the sum of its proper divisors (25092588).

56385081 is an frugal number, since it uses more digits than its factorization.

56385081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5012 (or 2506 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The cubic root of 56385081 is about 383.4611786977.

Multiplying 56385081 by its sum of digits (36), we get a square (2029862916 = 45054²).

The spelling of 56385081 in words is "fifty-six million, three hundred eighty-five thousand, eighty-one".