23525281 has 8 divisors (see below), whose sum is σ = 25620840. Its totient is φ = 21470592.

The previous prime is 23525261. The next prime is 23525309. The reversal of 23525281 is 18252532.

It can be written as a sum of positive squares in 4 ways, for example, as 2512225 + 21013056 = 1585^2 + 4584^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-23525281 is a prime.

It is a super-2 number, since 2×23525281² = 1106877692257922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23525221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9010 + ... + 11323.

It is an arithmetic number, because the mean of its divisors is an integer number (3202605).

Almost surely, 2^23525281 is an apocalyptic number.

It is an amenable number.

23525281 is a deficient number, since it is larger than the sum of its proper divisors (2095559).

23525281 is a wasteful number, since it uses less digits than its factorization.

23525281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20435.

The product of its digits is 4800, while the sum is 28.

The square root of 23525281 is about 4850.2866925575. The cubic root of 23525281 is about 286.5353925415.

The spelling of 23525281 in words is "twenty-three million, five hundred twenty-five thousand, two hundred eighty-one".