51115325 has 12 divisors (see below), whose sum is σ = 63472500. Its totient is φ = 40834560.

The previous prime is 51115297. The next prime is 51115327. The reversal of 51115325 is 52351115.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 11437924 + 39677401 = 3382^2 + 6299^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51115325 is a prime.

It is a super-2 number, since 2×51115325² = 5225552899711250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51115325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51115327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30407 + ... + 32043.

It is an arithmetic number, because the mean of its divisors is an integer number (5289375).

Almost surely, 2^51115325 is an apocalyptic number.

It is an amenable number.

51115325 is a deficient number, since it is larger than the sum of its proper divisors (12357175).

51115325 is a wasteful number, since it uses less digits than its factorization.

51115325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896 (or 2891 counting only the distinct ones).

The product of its digits is 750, while the sum is 23.

The square root of 51115325 is about 7149.4982341420. The cubic root of 51115325 is about 371.1222924196.

The spelling of 51115325 in words is "fifty-one million, one hundred fifteen thousand, three hundred twenty-five".