51522318 has 24 divisors (see below), whose sum is σ = 115767288. Its totient is φ = 17173944.

The previous prime is 51522311. The next prime is 51522329. The reversal of 51522318 is 81322515.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 51522291 and 51522300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51522311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52521 + ... + 53492.

It is an arithmetic number, because the mean of its divisors is an integer number (4823637).

Almost surely, 2^51522318 is an apocalyptic number.

51522318 is an abundant number, since it is smaller than the sum of its proper divisors (64244970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51522318 is a wasteful number, since it uses less digits than its factorization.

51522318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106030 (or 106018 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 51522318 is about 7177.9048475164. The cubic root of 51522318 is about 372.1046791778.

The spelling of 51522318 in words is "fifty-one million, five hundred twenty-two thousand, three hundred eighteen".