57642311 has 4 divisors (see below), whose sum is σ = 58502712. Its totient is φ = 56781912.

The previous prime is 57642307. The next prime is 57642331. The reversal of 57642311 is 11324675.

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 57642311 - 2² = 57642307 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 (57642331) 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, 430100 + ... + 430233.

It is an arithmetic number, because the mean of its divisors is an integer number (14625678).

Almost surely, 2^57642311 is an apocalyptic number.

57642311 is a deficient number, since it is larger than the sum of its proper divisors (860401).

57642311 is an equidigital number, since it uses as much as digits as its factorization.

57642311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860400.

The product of its digits is 5040, while the sum is 29.

The square root of 57642311 is about 7592.2533545714. The cubic root of 57642311 is about 386.2902927841.

Adding to 57642311 its reverse (11324675), we get a palindrome (68966986).

The spelling of 57642311 in words is "fifty-seven million, six hundred forty-two thousand, three hundred eleven".