51248225 has 24 divisors (see below), whose sum is σ = 76453440. Its totient is φ = 33289920.

The previous prime is 51248213. The next prime is 51248231. The reversal of 51248225 is 52284215.

It is not a de Polignac number, because 51248225 - 2⁶ = 51248161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4382 + ... + 11031.

It is an arithmetic number, because the mean of its divisors is an integer number (3185560).

Almost surely, 2^51248225 is an apocalyptic number.

It is an amenable number.

51248225 is a deficient number, since it is larger than the sum of its proper divisors (25205215).

51248225 is a wasteful number, since it uses less digits than its factorization.

51248225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15449 (or 15444 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The square root of 51248225 is about 7158.7865591872. The cubic root of 51248225 is about 371.4436537620.

The spelling of 51248225 in words is "fifty-one million, two hundred forty-eight thousand, two hundred twenty-five".