51222357 has 12 divisors (see below), whose sum is σ = 77205024. Its totient is φ = 32663400.

The previous prime is 51222317. The next prime is 51222361. The reversal of 51222357 is 75322215.

It is not a de Polignac number, because 51222357 - 2¹² = 51218261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51222357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51222317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123519 + ... + 123932.

It is an arithmetic number, because the mean of its divisors is an integer number (6433752).

Almost surely, 2^51222357 is an apocalyptic number.

It is an amenable number.

51222357 is a deficient number, since it is larger than the sum of its proper divisors (25982667).

51222357 is a wasteful number, since it uses less digits than its factorization.

51222357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247480 (or 247477 counting only the distinct ones).

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

The square root of 51222357 is about 7156.9796003622. The cubic root of 51222357 is about 371.3811467415.

The spelling of 51222357 in words is "fifty-one million, two hundred twenty-two thousand, three hundred fifty-seven".