231764401236 has 12 divisors (see below), whose sum is σ = 540783602912. Its totient is φ = 77254800408.

The previous prime is 231764401223. The next prime is 231764401289. The reversal of 231764401236 is 632104467132.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 231764401194 and 231764401203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9656850040 + ... + 9656850063.

Almost surely, 2^231764401236 is an apocalyptic number.

It is an amenable number.

231764401236 is an abundant number, since it is smaller than the sum of its proper divisors (309019201676).

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

231764401236 is a wasteful number, since it uses less digits than its factorization.

231764401236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19313700110 (or 19313700108 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

Adding to 231764401236 its reverse (632104467132), we get a palindrome (863868868368).

The spelling of 231764401236 in words is "two hundred thirty-one billion, seven hundred sixty-four million, four hundred one thousand, two hundred thirty-six".