51521522 has 8 divisors (see below), whose sum is σ = 83227116. Its totient is φ = 23779152.

The previous prime is 51521513. The next prime is 51521537. The reversal of 51521522 is 22512515.

51521522 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 2 ways, for example, as 50395801 + 1125721 = 7099^2 + 1061^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 990773 + ... + 990824.

Almost surely, 2^51521522 is an apocalyptic number.

51521522 is a deficient number, since it is larger than the sum of its proper divisors (31705594).

51521522 is a wasteful number, since it uses less digits than its factorization.

51521522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981612.

The product of its digits is 1000, while the sum is 23.

The square root of 51521522 is about 7177.8493993675. The cubic root of 51521522 is about 372.1027628765.

The spelling of 51521522 in words is "fifty-one million, five hundred twenty-one thousand, five hundred twenty-two".