23431274643157 has 4 divisors (see below), whose sum is σ = 23873374164780. Its totient is φ = 22989175121536.

The previous prime is 23431274643121. The next prime is 23431274643181. The reversal of 23431274643157 is 75134647213432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12115592716516 + 11315681926641 = 3480746^2 + 3363879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23431274643157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23431274640157) 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, 221049760732 + ... + 221049760837.

It is an arithmetic number, because the mean of its divisors is an integer number (5968343541195).

Almost surely, 2^{23431274643157} is an apocalyptic number.

It is an amenable number.

23431274643157 is a deficient number, since it is larger than the sum of its proper divisors (442099521623).

23431274643157 is an equidigital number, since it uses as much as digits as its factorization.

23431274643157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442099521622.

The product of its digits is 10160640, while the sum is 52.

The spelling of 23431274643157 in words is "twenty-three trillion, four hundred thirty-one billion, two hundred seventy-four million, six hundred forty-three thousand, one hundred fifty-seven".