231252155661213 has 8 divisors (see below), whose sum is σ = 342595786164800. Its totient is φ = 154168103774124.

The previous prime is 231252155661209. The next prime is 231252155661253. The reversal of 231252155661213 is 312166551252132.

231252155661213 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 5 + 2 + 15 + 5 + 6 + 612 + 13 = 666.

It is not a de Polignac number, because 231252155661213 - 2² = 231252155661209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231252155661253) 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, 4282447327033 + ... + 4282447327086.

It is an arithmetic number, because the mean of its divisors is an integer number (42824473270600).

Almost surely, 2^{231252155661213} is an apocalyptic number.

It is an amenable number.

231252155661213 is a deficient number, since it is larger than the sum of its proper divisors (111343630503587).

231252155661213 is an equidigital number, since it uses as much as digits as its factorization.

231252155661213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8564894654128 (or 8564894654122 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 231252155661213 in words is "two hundred thirty-one trillion, two hundred fifty-two billion, one hundred fifty-five million, six hundred sixty-one thousand, two hundred thirteen".