51898625 has 8 divisors (see below), whose sum is σ = 64769640. Its totient is φ = 41518800.

The previous prime is 51898621. The next prime is 51898631. The reversal of 51898625 is 52689815.

It can be written as a sum of positive squares in 4 ways, for example, as 461041 + 51437584 = 679^2 + 7172^2 .

It is not a de Polignac number, because 51898625 - 2² = 51898621 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51898621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207470 + ... + 207719.

It is an arithmetic number, because the mean of its divisors is an integer number (8096205).

Almost surely, 2^51898625 is an apocalyptic number.

It is an amenable number.

51898625 is a deficient number, since it is larger than the sum of its proper divisors (12871015).

51898625 is an equidigital number, since it uses as much as digits as its factorization.

51898625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415204 (or 415194 counting only the distinct ones).

The product of its digits is 172800, while the sum is 44.

The square root of 51898625 is about 7204.0700301982. The cubic root of 51898625 is about 373.0084044806.

The spelling of 51898625 in words is "fifty-one million, eight hundred ninety-eight thousand, six hundred twenty-five".