23551525 has 6 divisors (see below), whose sum is σ = 29203922. Its totient is φ = 18841200.

The previous prime is 23551501. The next prime is 23551529. The reversal of 23551525 is 52515532.

It can be written as a sum of positive squares in 3 ways, for example, as 2556801 + 20994724 = 1599^2 + 4582^2 .

It is not a de Polignac number, because 23551525 - 2²¹ = 21454373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23551493 and 23551502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23551529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 471006 + ... + 471055.

Almost surely, 2^23551525 is an apocalyptic number.

23551525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23551525 is a deficient number, since it is larger than the sum of its proper divisors (5652397).

23551525 is an equidigital number, since it uses as much as digits as its factorization.

23551525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942071 (or 942066 counting only the distinct ones).

The product of its digits is 7500, while the sum is 28.

The square root of 23551525 is about 4852.9913455517. The cubic root of 23551525 is about 286.6419026442.

The spelling of 23551525 in words is "twenty-three million, five hundred fifty-one thousand, five hundred twenty-five".