56377381 has 8 divisors (see below), whose sum is σ = 58064760. Its totient is φ = 54698688.

The previous prime is 56377367. The next prime is 56377403. The reversal of 56377381 is 18377365.

It can be written as a sum of positive squares in 4 ways, for example, as 20557156 + 35820225 = 4534^2 + 5985^2 .

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 56377381 - 2¹³ = 56369189 is a prime.

It is a super-2 number, since 2×56377381² = 6356818176838322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56377331) 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, 12435 + ... + 16351.

It is an arithmetic number, because the mean of its divisors is an integer number (7258095).

Almost surely, 2^56377381 is an apocalyptic number.

It is an amenable number.

56377381 is a deficient number, since it is larger than the sum of its proper divisors (1687379).

56377381 is a wasteful number, since it uses less digits than its factorization.

56377381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343.

The product of its digits is 105840, while the sum is 40.

The square root of 56377381 is about 7508.4872644228. The cubic root of 56377381 is about 383.4437226293.

The spelling of 56377381 in words is "fifty-six million, three hundred seventy-seven thousand, three hundred eighty-one".