23511622225 has 81 divisors (see below), whose sum is σ = 36833081427. Its totient is φ = 14837921280.

The previous prime is 23511622223. The next prime is 23511622249. The reversal of 23511622225 is 52222611532.

The square root of 23511622225 is 153335.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 23507329041 + 4293184 = 153321^2 + 2072^2 .

It is not a de Polignac number, because 23511622225 - 2¹ = 23511622223 is a prime.

It is a super-2 number, since 2×23511622225² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23511622223) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 69767257 + ... + 69767593.

Almost surely, 2^23511622225 is an apocalyptic number.

23511622225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

23511622225 is the 153335-th square number.

23511622225 is the 76668-th centered octagonal number.

It is an amenable number.

23511622225 is a deficient number, since it is larger than the sum of its proper divisors (13321459202).

23511622225 is an equidigital number, since it uses as much as digits as its factorization.

23511622225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 362 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

Multiplying 23511622225 by its product of digits (14400), we get a square (338567360040000 = 18400200²).

The spelling of 23511622225 in words is "twenty-three billion, five hundred eleven million, six hundred twenty-two thousand, two hundred twenty-five".