57212507 has 8 divisors (see below), whose sum is σ = 63936432. Its totient is φ = 50742400.

The previous prime is 57212501. The next prime is 57212513. The reversal of 57212507 is 70521275.

It is an interprime number because it is at equal distance from previous prime (57212501) and next prime (57212513).

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

It is a cyclic number.

It is not a de Polignac number, because 57212507 - 2⁸ = 57212251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57212507.

It is not an unprimeable number, because it can be changed into a prime (57212501) 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, 62978 + ... + 63879.

It is an arithmetic number, because the mean of its divisors is an integer number (7992054).

Almost surely, 2^57212507 is an apocalyptic number.

57212507 is a deficient number, since it is larger than the sum of its proper divisors (6723925).

57212507 is a wasteful number, since it uses less digits than its factorization.

57212507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126909.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 57212507 is about 7563.8949622532. The cubic root of 57212507 is about 385.3277851644.

It can be divided in two parts, 5721 and 2507, that added together give a palindrome (8228).

The spelling of 57212507 in words is "fifty-seven million, two hundred twelve thousand, five hundred seven".