51031025 has 24 divisors (see below), whose sum is σ = 67495680. Its totient is φ = 38140160.

The previous prime is 51031007. The next prime is 51031031. The reversal of 51031025 is 52013015.

It is not a de Polignac number, because 51031025 - 2¹² = 51026929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 51030994 and 51031012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70616 + ... + 71334.

It is an arithmetic number, because the mean of its divisors is an integer number (2812320).

Almost surely, 2^51031025 is an apocalyptic number.

It is an amenable number.

51031025 is a deficient number, since it is larger than the sum of its proper divisors (16464655).

51031025 is a wasteful number, since it uses less digits than its factorization.

51031025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 51031025 is about 7143.6002827706. The cubic root of 51031025 is about 370.9181603979.

The spelling of 51031025 in words is "fifty-one million, thirty-one thousand, twenty-five".