57211687 has 8 divisors (see below), whose sum is σ = 63115920. Its totient is φ = 51522240.

The previous prime is 57211673. The next prime is 57211697. The reversal of 57211687 is 78611275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 57211687 - 2⁷ = 57211559 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 (57211607) 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, 53137 + ... + 54202.

It is an arithmetic number, because the mean of its divisors is an integer number (7889490).

Almost surely, 2^57211687 is an apocalyptic number.

57211687 is a deficient number, since it is larger than the sum of its proper divisors (5904233).

57211687 is a wasteful number, since it uses less digits than its factorization.

57211687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107393.

The product of its digits is 23520, while the sum is 37.

The square root of 57211687 is about 7563.8407571815. The cubic root of 57211687 is about 385.3259442482.

The spelling of 57211687 in words is "fifty-seven million, two hundred eleven thousand, six hundred eighty-seven".