2550021808 has 40 divisors (see below), whose sum is σ = 5104701056. Its totient is φ = 1232755200.

The previous prime is 2550021739. The next prime is 2550021821. The reversal of 2550021808 is 8081200552.

It is a super-2 number, since 2×2550021808² = 13005222442551177728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 2550021808.

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, 862060 + ... + 865012.

Almost surely, 2^2550021808 is an apocalyptic number.

It is an amenable number.

2550021808 is an abundant number, since it is smaller than the sum of its proper divisors (2554679248).

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

2550021808 is a wasteful number, since it uses less digits than its factorization.

2550021808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4733 (or 4727 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 2550021808 is about 50497.7406227249. The cubic root of 2550021808 is about 1366.2011026804.

The spelling of 2550021808 in words is "two billion, five hundred fifty million, twenty-one thousand, eight hundred eight".