213417165957 has 4 divisors (see below), whose sum is σ = 284556221280. Its totient is φ = 142278110636.

The previous prime is 213417165943. The next prime is 213417166007. The reversal of 213417165957 is 759561714312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213417165957 - 2⁸ = 213417165701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213417165457) 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, 35569527657 + ... + 35569527662.

It is an arithmetic number, because the mean of its divisors is an integer number (71139055320).

Almost surely, 2^213417165957 is an apocalyptic number.

It is an amenable number.

213417165957 is a deficient number, since it is larger than the sum of its proper divisors (71139055323).

213417165957 is an equidigital number, since it uses as much as digits as its factorization.

213417165957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71139055322.

The product of its digits is 1587600, while the sum is 51.

The spelling of 213417165957 in words is "two hundred thirteen billion, four hundred seventeen million, one hundred sixty-five thousand, nine hundred fifty-seven".