51725225 has 6 divisors (see below), whose sum is σ = 64139310. Its totient is φ = 41380160.

The previous prime is 51725221. The next prime is 51725243. The reversal of 51725225 is 52252715.

It can be written as a sum of positive squares in 3 ways, for example, as 361 + 51724864 = 19^2 + 7192^2 .

It is not a de Polignac number, because 51725225 - 2² = 51725221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51725221) 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, 1034480 + ... + 1034529.

It is an arithmetic number, because the mean of its divisors is an integer number (10689885).

Almost surely, 2^51725225 is an apocalyptic number.

It is an amenable number.

51725225 is a deficient number, since it is larger than the sum of its proper divisors (12414085).

51725225 is a wasteful number, since it uses less digits than its factorization.

51725225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069019 (or 2069014 counting only the distinct ones).

The product of its digits is 7000, while the sum is 29.

The square root of 51725225 is about 7192.0250972866. The cubic root of 51725225 is about 372.5925178959.

The spelling of 51725225 in words is "fifty-one million, seven hundred twenty-five thousand, two hundred twenty-five".