51904525 has 12 divisors (see below), whose sum is σ = 66102292. Its totient is φ = 40400640.

The previous prime is 51904511. The next prime is 51904529. The reversal of 51904525 is 52540915.

It can be written as a sum of positive squares in 6 ways, for example, as 4652649 + 47251876 = 2157^2 + 6874^2 .

It is not a de Polignac number, because 51904525 - 2¹⁷ = 51773453 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51904529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27132 + ... + 28981.

Almost surely, 2^51904525 is an apocalyptic number.

It is an amenable number.

51904525 is a deficient number, since it is larger than the sum of its proper divisors (14197767).

51904525 is a wasteful number, since it uses less digits than its factorization.

51904525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56160 (or 56155 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 51904525 is about 7204.4795093053. The cubic root of 51904525 is about 373.0225388705.

The spelling of 51904525 in words is "fifty-one million, nine hundred four thousand, five hundred twenty-five".