231520650705 has 32 divisors (see below), whose sum is σ = 411671473920. Its totient is φ = 123453918720.

The previous prime is 231520650701. The next prime is 231520650707. The reversal of 231520650705 is 507056025132.

231520650705 is a `hidden beast` number, since 2 + 3 + 1 + 520 + 65 + 0 + 70 + 5 = 666.

It is not a de Polignac number, because 231520650705 - 2² = 231520650701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231520650705.

It is not an unprimeable number, because it can be changed into a prime (231520650701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 550564 + ... + 875306.

It is an arithmetic number, because the mean of its divisors is an integer number (12864733560).

Almost surely, 2^231520650705 is an apocalyptic number.

It is an amenable number.

231520650705 is a deficient number, since it is larger than the sum of its proper divisors (180150823215).

231520650705 is a wasteful number, since it uses less digits than its factorization.

231520650705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330038 (or 330032 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

Adding to 231520650705 its reverse (507056025132), we get a palindrome (738576675837).

The spelling of 231520650705 in words is "two hundred thirty-one billion, five hundred twenty million, six hundred fifty thousand, seven hundred five".