51052220 has 12 divisors (see below), whose sum is σ = 107209704. Its totient is φ = 20420880.

The previous prime is 51052219. The next prime is 51052237. The reversal of 51052220 is 2225015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276286 + ... + 1276325.

It is an arithmetic number, because the mean of its divisors is an integer number (8934142).

Almost surely, 2^51052220 is an apocalyptic number.

It is an amenable number.

51052220 is an abundant number, since it is smaller than the sum of its proper divisors (56157484).

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

51052220 is a wasteful number, since it uses less digits than its factorization.

51052220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552620 (or 2552618 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 51052220 is about 7145.0836244232. The cubic root of 51052220 is about 370.9695051257.

Adding to 51052220 its reverse (2225015), we get a palindrome (53277235).

The spelling of 51052220 in words is "fifty-one million, fifty-two thousand, two hundred twenty".