23521031255 has 4 divisors (see below), whose sum is σ = 28225237512. Its totient is φ = 18816825000.

The previous prime is 23521031251. The next prime is 23521031257. The reversal of 23521031255 is 55213012532.

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

It is not a de Polignac number, because 23521031255 - 2² = 23521031251 is a prime.

It is a super-2 number, since 2×23521031255² (a number of 22 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 (23521031251) 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, 2352103121 + ... + 2352103130.

It is an arithmetic number, because the mean of its divisors is an integer number (7056309378).

Almost surely, 2^23521031255 is an apocalyptic number.

23521031255 is a deficient number, since it is larger than the sum of its proper divisors (4704206257).

23521031255 is an equidigital number, since it uses as much as digits as its factorization.

23521031255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704206256.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 23521031255 its reverse (55213012532), we get a palindrome (78734043787).

The spelling of 23521031255 in words is "twenty-three billion, five hundred twenty-one million, thirty-one thousand, two hundred fifty-five".