221093874 has 80 divisors (see below), whose sum is σ = 537042528. Its totient is φ = 67713408.

The previous prime is 221093867. The next prime is 221093893. The reversal of 221093874 is 478390122.

It is a super-2 number, since 2×221093874² = 97765002240655752, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 117489 + ... + 119355.

Almost surely, 2^221093874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221093874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268521264).

221093874 is an abundant number, since it is smaller than the sum of its proper divisors (315948654).

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

221093874 is a wasteful number, since it uses less digits than its factorization.

221093874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 221093874 is about 14869.2257363993. The cubic root of 221093874 is about 604.6799518438.

The spelling of 221093874 in words is "two hundred twenty-one million, ninety-three thousand, eight hundred seventy-four".