231322101136 has 40 divisors (see below), whose sum is σ = 512285872320. Its totient is φ = 99123982464.

The previous prime is 231322101083. The next prime is 231322101137. The reversal of 231322101136 is 631101223132.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 231322101136.

It is not an unprimeable number, because it can be changed into a prime (231322101137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666795 + ... + 952501.

It is an arithmetic number, because the mean of its divisors is an integer number (12807146808).

Almost surely, 2^231322101136 is an apocalyptic number.

It is an amenable number.

231322101136 is an abundant number, since it is smaller than the sum of its proper divisors (280963771184).

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

231322101136 is a wasteful number, since it uses less digits than its factorization.

231322101136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292951 (or 292945 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 231322101136 its reverse (631101223132), we get a palindrome (862423324268).

The spelling of 231322101136 in words is "two hundred thirty-one billion, three hundred twenty-two million, one hundred one thousand, one hundred thirty-six".