23998657225 has 9 divisors (see below), whose sum is σ = 29759295463. Its totient is φ = 19198306120.

The previous prime is 23998657213. The next prime is 23998657229. The reversal of 23998657225 is 52275689932.

The square root of 23998657225 is 154915.

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

It can be written as a sum of positive squares in only one way, i.e., 8639516601 + 15359140624 = 92949^2 + 123932^2 .

It is not a de Polignac number, because 23998657225 - 2¹³ = 23998649033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23998657225.

It is not an unprimeable number, because it can be changed into a prime (23998657229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 759084 + ... + 790066.

Almost surely, 2^23998657225 is an apocalyptic number.

23998657225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

23998657225 is the 154915-th square number.

23998657225 is the 77458-th centered octagonal number.

It is an amenable number.

23998657225 is a deficient number, since it is larger than the sum of its proper divisors (5760638238).

23998657225 is an frugal number, since it uses more digits than its factorization.

23998657225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61976 (or 30988 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 58.

The spelling of 23998657225 in words is "twenty-three billion, nine hundred ninety-eight million, six hundred fifty-seven thousand, two hundred twenty-five".