51261025 has 12 divisors (see below), whose sum is σ = 64161072. Its totient is φ = 40623440.

The previous prime is 51261019. The next prime is 51261047. The reversal of 51261025 is 52016215.

It is not a de Polignac number, because 51261025 - 2⁷ = 51260897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51260987 and 51261005.

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, 6907 + ... + 12256.

It is an arithmetic number, because the mean of its divisors is an integer number (5346756).

Almost surely, 2^51261025 is an apocalyptic number.

It is an amenable number.

51261025 is a deficient number, since it is larger than the sum of its proper divisors (12900047).

51261025 is a wasteful number, since it uses less digits than its factorization.

51261025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19280 (or 19275 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 51261025 is about 7159.6805096317. The cubic root of 51261025 is about 371.4745756980.

The spelling of 51261025 in words is "fifty-one million, two hundred sixty-one thousand, twenty-five".