57212687 has 8 divisors (see below), whose sum is σ = 65471616. Its totient is φ = 48975192.

The previous prime is 57212681. The next prime is 57212717. The reversal of 57212687 is 78621275.

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

It is not a de Polignac number, because 57212687 - 2¹⁰ = 57211663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57212687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57212681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848 + ... + 10730.

It is an arithmetic number, because the mean of its divisors is an integer number (8183952).

Almost surely, 2^57212687 is an apocalyptic number.

57212687 is a deficient number, since it is larger than the sum of its proper divisors (8258929).

57212687 is an equidigital number, since it uses as much as digits as its factorization.

57212687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10717.

The product of its digits is 47040, while the sum is 38.

The square root of 57212687 is about 7563.9068608755. The cubic root of 57212687 is about 385.3281892656.

It can be divided in two parts, 5721268 and 7, that added together give a palindrome (5721275).

The spelling of 57212687 in words is "fifty-seven million, two hundred twelve thousand, six hundred eighty-seven".