57311951 has 4 divisors (see below), whose sum is σ = 58283400. Its totient is φ = 56340504.

The previous prime is 57311939. The next prime is 57311971. The reversal of 57311951 is 15911375.

It is a happy number.

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 57311951 - 2⁶ = 57311887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57311911) 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, 485636 + ... + 485753.

It is an arithmetic number, because the mean of its divisors is an integer number (14570850).

Almost surely, 2^57311951 is an apocalyptic number.

57311951 is a deficient number, since it is larger than the sum of its proper divisors (971449).

57311951 is an equidigital number, since it uses as much as digits as its factorization.

57311951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971448.

The product of its digits is 4725, while the sum is 32.

The square root of 57311951 is about 7570.4657056221. The cubic root of 57311951 is about 385.5509086185.

The spelling of 57311951 in words is "fifty-seven million, three hundred eleven thousand, nine hundred fifty-one".