56805381 has 24 divisors (see below), whose sum is σ = 90103104. Its totient is φ = 35640000.

The previous prime is 56805379. The next prime is 56805389. The reversal of 56805381 is 18350865.

It is not a de Polignac number, because 56805381 - 2¹ = 56805379 is a prime.

It is a super-2 number, since 2×56805381² = 6453702621110322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56805389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2745 + ... + 11006.

It is an arithmetic number, because the mean of its divisors is an integer number (3754296).

Almost surely, 2^56805381 is an apocalyptic number.

56805381 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

56805381 is a deficient number, since it is larger than the sum of its proper divisors (33297723).

56805381 is a wasteful number, since it uses less digits than its factorization.

56805381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13783 (or 13771 counting only the distinct ones).

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

The square root of 56805381 is about 7536.9344563954. The cubic root of 56805381 is about 384.4116069835.

The spelling of 56805381 in words is "fifty-six million, eight hundred five thousand, three hundred eighty-one".