201621938 has 16 divisors (see below), whose sum is σ = 365969664. Its totient is φ = 81326400.

The previous prime is 201621907. The next prime is 201621947. The reversal of 201621938 is 839126102.

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, 423338 + ... + 423813.

It is an arithmetic number, because the mean of its divisors is an integer number (22873104).

Almost surely, 2^201621938 is an apocalyptic number.

201621938 is a deficient number, since it is larger than the sum of its proper divisors (164347726).

201621938 is a wasteful number, since it uses less digits than its factorization.

201621938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847177.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 201621938 is about 14199.3639998417. The cubic root of 201621938 is about 586.3801518625.

The spelling of 201621938 in words is "two hundred one million, six hundred twenty-one thousand, nine hundred thirty-eight".