51222725 has 12 divisors (see below), whose sum is σ = 66278496. Its totient is φ = 39196080.

The previous prime is 51222709. The next prime is 51222733. The reversal of 51222725 is 52722215.

It is not a de Polignac number, because 51222725 - 2⁴ = 51222709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51222694 and 51222703.

It is a congruent number.

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, 43967 + ... + 45116.

It is an arithmetic number, because the mean of its divisors is an integer number (5523208).

Almost surely, 2^51222725 is an apocalyptic number.

It is an amenable number.

51222725 is a deficient number, since it is larger than the sum of its proper divisors (15055771).

51222725 is a wasteful number, since it uses less digits than its factorization.

51222725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89116 (or 89111 counting only the distinct ones).

The product of its digits is 2800, while the sum is 26.

The square root of 51222725 is about 7157.0053094852. The cubic root of 51222725 is about 371.3820361184.

The spelling of 51222725 in words is "fifty-one million, two hundred twenty-two thousand, seven hundred twenty-five".