51305525 has 12 divisors (see below), whose sum is σ = 66385632. Its totient is φ = 39259440.

The previous prime is 51305521. The next prime is 51305539. The reversal of 51305525 is 52550315.

It is not a de Polignac number, because 51305525 - 2² = 51305521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51305494 and 51305503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51305521) 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, 44039 + ... + 45188.

It is an arithmetic number, because the mean of its divisors is an integer number (5532136).

Almost surely, 2^51305525 is an apocalyptic number.

It is an amenable number.

51305525 is a deficient number, since it is larger than the sum of its proper divisors (15080107).

51305525 is a wasteful number, since it uses less digits than its factorization.

51305525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89260 (or 89255 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 51305525 is about 7162.7875160443. The cubic root of 51305525 is about 371.5820377023.

The spelling of 51305525 in words is "fifty-one million, three hundred five thousand, five hundred twenty-five".