231642131604 has 96 divisors (see below), whose sum is σ = 584565590784. Its totient is φ = 70970065920.

The previous prime is 231642131509. The next prime is 231642131627. The reversal of 231642131604 is 406131246132.

It is a happy number.

It is a super-2 number, since 2×231642131604² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59226409 + ... + 59230319.

It is an arithmetic number, because the mean of its divisors is an integer number (6089224904).

Almost surely, 2^231642131604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231642131604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292282795392).

231642131604 is an abundant number, since it is smaller than the sum of its proper divisors (352923459180).

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

231642131604 is a wasteful number, since it uses less digits than its factorization.

231642131604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5457 (or 5455 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 231642131604 its reverse (406131246132), we get a palindrome (637773377736).

The spelling of 231642131604 in words is "two hundred thirty-one billion, six hundred forty-two million, one hundred thirty-one thousand, six hundred four".