57038731 has 4 divisors (see below), whose sum is σ = 57178600. Its totient is φ = 56898864.

The previous prime is 57038713. The next prime is 57038767. The reversal of 57038731 is 13783075.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57038731 - 2⁵ = 57038699 is a prime.

It is a super-2 number, since 2×57038731² = 6506833668180722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57038701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69321 + ... + 70138.

It is an arithmetic number, because the mean of its divisors is an integer number (14294650).

Almost surely, 2^57038731 is an apocalyptic number.

57038731 is a deficient number, since it is larger than the sum of its proper divisors (139869).

57038731 is a wasteful number, since it uses less digits than its factorization.

57038731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139868.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 57038731 is about 7552.3990228271. The cubic root of 57038731 is about 384.9372608173.

The spelling of 57038731 in words is "fifty-seven million, thirty-eight thousand, seven hundred thirty-one".