231664331643 has 8 divisors (see below), whose sum is σ = 308913600000. Its totient is φ = 154428975528.

The previous prime is 231664331629. The next prime is 231664331683. The reversal of 231664331643 is 346133466132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231664331643 - 2⁵ = 231664331611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231664331595 and 231664331604.

It is not an unprimeable number, because it can be changed into a prime (231664331603) 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, 3439143 + ... + 3505856.

It is an arithmetic number, because the mean of its divisors is an integer number (38614200000).

Almost surely, 2^231664331643 is an apocalyptic number.

231664331643 is a deficient number, since it is larger than the sum of its proper divisors (77249268357).

231664331643 is a wasteful number, since it uses less digits than its factorization.

231664331643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6956121.

The product of its digits is 559872, while the sum is 42.

Adding to 231664331643 its reverse (346133466132), we get a palindrome (577797797775).

The spelling of 231664331643 in words is "two hundred thirty-one billion, six hundred sixty-four million, three hundred thirty-one thousand, six hundred forty-three".