221887140 has 24 divisors (see below), whose sum is σ = 621284160. Its totient is φ = 59169888.

The previous prime is 221887129. The next prime is 221887151. The reversal of 221887140 is 41788122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221887129) and next prime (221887151).

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, 1849000 + ... + 1849119.

It is an arithmetic number, because the mean of its divisors is an integer number (25886840).

Almost surely, 2^221887140 is an apocalyptic number.

221887140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221887140 is an abundant number, since it is smaller than the sum of its proper divisors (399397020).

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

221887140 is a wasteful number, since it uses less digits than its factorization.

221887140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698131 (or 3698129 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 221887140 is about 14895.8766106597. The cubic root of 221887140 is about 605.4022687261.

The spelling of 221887140 in words is "two hundred twenty-one million, eight hundred eighty-seven thousand, one hundred forty".