51522820 has 24 divisors (see below), whose sum is σ = 108360000. Its totient is φ = 20578272.

The previous prime is 51522817. The next prime is 51522839. The reversal of 51522820 is 2822515.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15681 + ... + 18679.

It is an arithmetic number, because the mean of its divisors is an integer number (4515000).

Almost surely, 2^51522820 is an apocalyptic number.

It is an amenable number.

51522820 is an abundant number, since it is smaller than the sum of its proper divisors (56837180).

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

51522820 is a wasteful number, since it uses less digits than its factorization.

51522820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867 (or 3865 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 51522820 is about 7177.9398158525. The cubic root of 51522820 is about 372.1058876893.

The spelling of 51522820 in words is "fifty-one million, five hundred twenty-two thousand, eight hundred twenty".