51536225 has 12 divisors (see below), whose sum is σ = 68821116. Its totient is φ = 38057280.

The previous prime is 51536213. The next prime is 51536237. The reversal of 51536225 is 52263515.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51536213) and next prime (51536237).

It can be written as a sum of positive squares in 6 ways, for example, as 26896 + 51509329 = 164^2 + 7177^2 .

It is not a de Polignac number, because 51536225 - 2⁴ = 51536209 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78962 + ... + 79611.

It is an arithmetic number, because the mean of its divisors is an integer number (5735093).

Almost surely, 2^51536225 is an apocalyptic number.

It is an amenable number.

51536225 is a deficient number, since it is larger than the sum of its proper divisors (17284891).

51536225 is a wasteful number, since it uses less digits than its factorization.

51536225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158596 (or 158591 counting only the distinct ones).

The product of its digits is 9000, while the sum is 29.

The square root of 51536225 is about 7178.8735188747. The cubic root of 51536225 is about 372.1381558952.

The spelling of 51536225 in words is "fifty-one million, five hundred thirty-six thousand, two hundred twenty-five".