202221990 has 48 divisors (see below), whose sum is σ = 542745216. Its totient is φ = 52185600.

The previous prime is 202221989. The next prime is 202222019. The reversal of 202221990 is 99122202.

It is a Curzon number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 33451 + ... + 39030.

It is an arithmetic number, because the mean of its divisors is an integer number (11307192).

Almost surely, 2^202221990 is an apocalyptic number.

202221990 is an abundant number, since it is smaller than the sum of its proper divisors (340523226).

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

202221990 is a wasteful number, since it uses less digits than its factorization.

202221990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72525 (or 72522 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 202221990 is about 14220.4778400727. The cubic root of 202221990 is about 586.9612891865.

The spelling of 202221990 in words is "two hundred two million, two hundred twenty-one thousand, nine hundred ninety".