51222375 has 40 divisors (see below), whose sum is σ = 95512560. Its totient is φ = 27313200.

The previous prime is 51222361. The next prime is 51222383. The reversal of 51222375 is 57322215.

It is not a de Polignac number, because 51222375 - 2⁷ = 51222247 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7596 + ... + 12654.

It is an arithmetic number, because the mean of its divisors is an integer number (2387814).

Almost surely, 2^51222375 is an apocalyptic number.

51222375 is a deficient number, since it is larger than the sum of its proper divisors (44290185).

51222375 is an equidigital number, since it uses as much as digits as its factorization.

51222375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086 (or 5067 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 51222375 is about 7156.9808578758. The cubic root of 51222375 is about 371.3811902438.

The spelling of 51222375 in words is "fifty-one million, two hundred twenty-two thousand, three hundred seventy-five".