57216851 has 2 divisors, whose sum is σ = 57216852. Its totient is φ = 57216850.

The previous prime is 57216829. The next prime is 57216869. The reversal of 57216851 is 15861275.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57216851 - 2⁶ = 57216787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57216811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28608425 + 28608426.

It is an arithmetic number, because the mean of its divisors is an integer number (28608426).

Almost surely, 2^57216851 is an apocalyptic number.

57216851 is a deficient number, since it is larger than the sum of its proper divisors (1).

57216851 is an equidigital number, since it uses as much as digits as its factorization.

57216851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 35.

The square root of 57216851 is about 7564.1821104466. The cubic root of 57216851 is about 385.3375372368.

The spelling of 57216851 in words is "fifty-seven million, two hundred sixteen thousand, eight hundred fifty-one".