209422892131 has 16 divisors (see below), whose sum is σ = 221838566400. Its totient is φ = 197360116128.

The previous prime is 209422892087. The next prime is 209422892149. The reversal of 209422892131 is 131298224902.

It is a cyclic number.

It is not a de Polignac number, because 209422892131 - 2²⁷ = 209288674403 is a prime.

It is a super-2 number, since 2×209422892131² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209426892131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1736080 + ... + 1852786.

It is an arithmetic number, because the mean of its divisors is an integer number (13864910400).

Almost surely, 2^209422892131 is an apocalyptic number.

209422892131 is a deficient number, since it is larger than the sum of its proper divisors (12415674269).

209422892131 is a wasteful number, since it uses less digits than its factorization.

209422892131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118218.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 209422892131 in words is "two hundred nine billion, four hundred twenty-two million, eight hundred ninety-two thousand, one hundred thirty-one".