231212982351 has 36 divisors (see below), whose sum is σ = 341377607256. Its totient is φ = 138372848640.

The previous prime is 231212982337. The next prime is 231212982359. The reversal of 231212982351 is 153289212132.

It is not a de Polignac number, because 231212982351 - 2²² = 231208788047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231212982359) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 111105631 + ... + 111107711.

Almost surely, 2^231212982351 is an apocalyptic number.

231212982351 is a deficient number, since it is larger than the sum of its proper divisors (110164624905).

231212982351 is an frugal number, since it uses more digits than its factorization.

231212982351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252 (or 2134 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

Multiplying 231212982351 by its sum of digits (39), we get a square (9017306311689 = 3002883²).

231212982351 divided by its sum of digits (39) gives a square (5928538009 = 76997²).

The spelling of 231212982351 in words is "two hundred thirty-one billion, two hundred twelve million, nine hundred eighty-two thousand, three hundred fifty-one".