231433133277 has 4 divisors (see below), whose sum is σ = 308577511040. Its totient is φ = 154288755516.

The previous prime is 231433133273. The next prime is 231433133279. The reversal of 231433133277 is 772331334132.

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 not a de Polignac number, because 231433133277 - 2² = 231433133273 is a prime.

It is a super-2 number, since 2×231433133277² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231433133273) 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, 38572188877 + ... + 38572188882.

It is an arithmetic number, because the mean of its divisors is an integer number (77144377760).

Almost surely, 2^231433133277 is an apocalyptic number.

It is an amenable number.

231433133277 is a deficient number, since it is larger than the sum of its proper divisors (77144377763).

231433133277 is an equidigital number, since it uses as much as digits as its factorization.

231433133277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77144377762.

The product of its digits is 190512, while the sum is 39.

The spelling of 231433133277 in words is "two hundred thirty-one billion, four hundred thirty-three million, one hundred thirty-three thousand, two hundred seventy-seven".