213107665242 has 32 divisors (see below), whose sum is σ = 428603107392. Its totient is φ = 70638234624.

The previous prime is 213107665219. The next prime is 213107665279. The reversal of 213107665242 is 242566701312.

It is a self number, because there is not a number n which added to its sum of digits gives 213107665242.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2819488 + ... + 2894084.

It is an arithmetic number, because the mean of its divisors is an integer number (13393847106).

Almost surely, 2^213107665242 is an apocalyptic number.

213107665242 is an abundant number, since it is smaller than the sum of its proper divisors (215495442150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213107665242 is a wasteful number, since it uses less digits than its factorization.

213107665242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77262.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 213107665242 in words is "two hundred thirteen billion, one hundred seven million, six hundred sixty-five thousand, two hundred forty-two".