23153522117513 has 4 divisors (see below), whose sum is σ = 23951919431940. Its totient is φ = 22355124803088.

The previous prime is 23153522117419. The next prime is 23153522117569. The reversal of 23153522117513 is 31571122535132.

It is a happy number.

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 7856764152064 + 15296757965449 = 2802992^2 + 3911107^2 .

It is a cyclic number.

It is not a de Polignac number, because 23153522117513 - 2¹² = 23153522113417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23153522117113) 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, 399198657170 + ... + 399198657227.

It is an arithmetic number, because the mean of its divisors is an integer number (5987979857985).

Almost surely, 2^{23153522117513} is an apocalyptic number.

It is an amenable number.

23153522117513 is a deficient number, since it is larger than the sum of its proper divisors (798397314427).

23153522117513 is an equidigital number, since it uses as much as digits as its factorization.

23153522117513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798397314426.

The product of its digits is 189000, while the sum is 41.

The spelling of 23153522117513 in words is "twenty-three trillion, one hundred fifty-three billion, five hundred twenty-two million, one hundred seventeen thousand, five hundred thirteen".