231747263985 has 32 divisors (see below), whose sum is σ = 386156160000. Its totient is φ = 118535572736.

The previous prime is 231747263971. The next prime is 231747263989. The reversal of 231747263985 is 589362747132.

It is a cyclic number.

It is not a de Polignac number, because 231747263985 - 2⁵ = 231747263953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231747263989) 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, 1722945 + ... + 1852574.

It is an arithmetic number, because the mean of its divisors is an integer number (12067380000).

Almost surely, 2^231747263985 is an apocalyptic number.

It is an amenable number.

231747263985 is a deficient number, since it is larger than the sum of its proper divisors (154408896015).

231747263985 is a wasteful number, since it uses less digits than its factorization.

231747263985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575705.

The product of its digits is 15240960, while the sum is 57.

The spelling of 231747263985 in words is "two hundred thirty-one billion, seven hundred forty-seven million, two hundred sixty-three thousand, nine hundred eighty-five".