221891002 has 16 divisors (see below), whose sum is σ = 338607360. Its totient is φ = 109029888.

The previous prime is 221890979. The next prime is 221891017. The reversal of 221891002 is 200198122.

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, 62458 + ... + 65914.

It is an arithmetic number, because the mean of its divisors is an integer number (21162960).

Almost surely, 2^221891002 is an apocalyptic number.

221891002 is a deficient number, since it is larger than the sum of its proper divisors (116716358).

221891002 is a wasteful number, since it uses less digits than its factorization.

221891002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 221891002 is about 14896.0062432855. The cubic root of 221891002 is about 605.4057810973.

The spelling of 221891002 in words is "two hundred twenty-one million, eight hundred ninety-one thousand, two".