51107225 has 12 divisors (see below), whose sum is σ = 68248236. Its totient is φ = 37740480.

The previous prime is 51107191. The next prime is 51107257. The reversal of 51107225 is 52270115.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 18696976 + 32410249 = 4324^2 + 5693^2 .

It is not a de Polignac number, because 51107225 - 2⁸ = 51106969 is a prime.

It is a super-2 number, since 2×51107225² = 5223896894401250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51107225.

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, 78302 + ... + 78951.

It is an arithmetic number, because the mean of its divisors is an integer number (5687353).

Almost surely, 2^51107225 is an apocalyptic number.

It is an amenable number.

51107225 is a deficient number, since it is larger than the sum of its proper divisors (17141011).

51107225 is a wasteful number, since it uses less digits than its factorization.

51107225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157276 (or 157271 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 51107225 is about 7148.9317383788. The cubic root of 51107225 is about 371.1026880617.

The spelling of 51107225 in words is "fifty-one million, one hundred seven thousand, two hundred twenty-five".