231392406667 has 4 divisors (see below), whose sum is σ = 231394454200. Its totient is φ = 231390359136.

The previous prime is 231392406659. The next prime is 231392406689. The reversal of 231392406667 is 766604293132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231392406667 - 2³ = 231392406659 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 231392406667.

It is not an unprimeable number, because it can be changed into a prime (231392406607) 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, 843693 + ... + 1083790.

It is an arithmetic number, because the mean of its divisors is an integer number (57848613550).

Almost surely, 2^231392406667 is an apocalyptic number.

231392406667 is a deficient number, since it is larger than the sum of its proper divisors (2047533).

231392406667 is a wasteful number, since it uses less digits than its factorization.

231392406667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047532.

The product of its (nonzero) digits is 1959552, while the sum is 49.

Adding to 231392406667 its reverse (766604293132), we get a palindrome (997996699799).

The spelling of 231392406667 in words is "two hundred thirty-one billion, three hundred ninety-two million, four hundred six thousand, six hundred sixty-seven".