51222925 has 18 divisors (see below), whose sum is σ = 68575038. Its totient is φ = 37730880.

The previous prime is 51222901. The next prime is 51222929. The reversal of 51222925 is 52922215.

51222925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 9 ways, for example, as 14280841 + 36942084 = 3779^2 + 6078^2 .

It is not a de Polignac number, because 51222925 - 2²³ = 42834317 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51222893 and 51222902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51222929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 128827 + ... + 129223.

Almost surely, 2^51222925 is an apocalyptic number.

It is an amenable number.

51222925 is a deficient number, since it is larger than the sum of its proper divisors (17352113).

51222925 is an equidigital number, since it uses as much as digits as its factorization.

51222925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817 (or 415 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 51222925 is about 7157.0192817960. The cubic root of 51222925 is about 371.3825194736.

The spelling of 51222925 in words is "fifty-one million, two hundred twenty-two thousand, nine hundred twenty-five".