51523225 has 24 divisors (see below), whose sum is σ = 69995520. Its totient is φ = 37389120.

The previous prime is 51523187. The next prime is 51523229. The reversal of 51523225 is 52232515.

It is a happy number.

It is not a de Polignac number, because 51523225 - 2¹¹ = 51521177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 51523225.

It is not an unprimeable number, because it can be changed into a prime (51523229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17832 + ... + 20518.

It is an arithmetic number, because the mean of its divisors is an integer number (2916480).

Almost surely, 2^51523225 is an apocalyptic number.

It is an amenable number.

51523225 is a deficient number, since it is larger than the sum of its proper divisors (18472295).

51523225 is a wasteful number, since it uses less digits than its factorization.

51523225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769 (or 2764 counting only the distinct ones).

The product of its digits is 3000, while the sum is 25.

The square root of 51523225 is about 7177.9680272344. The cubic root of 51523225 is about 372.1068626779.

The spelling of 51523225 in words is "fifty-one million, five hundred twenty-three thousand, two hundred twenty-five".