231463226561 has 4 divisors (see below), whose sum is σ = 264529401792. Its totient is φ = 198397051332.

The previous prime is 231463226549. The next prime is 231463226567. The reversal of 231463226561 is 165622364132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231463226561 - 2¹⁸ = 231462964417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231463226567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16533087605 + ... + 16533087618.

It is an arithmetic number, because the mean of its divisors is an integer number (66132350448).

Almost surely, 2^231463226561 is an apocalyptic number.

It is an amenable number.

231463226561 is a deficient number, since it is larger than the sum of its proper divisors (33066175231).

231463226561 is an equidigital number, since it uses as much as digits as its factorization.

231463226561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33066175230.

The product of its digits is 311040, while the sum is 41.

The spelling of 231463226561 in words is "two hundred thirty-one billion, four hundred sixty-three million, two hundred twenty-six thousand, five hundred sixty-one".