221149980 has 96 divisors (see below), whose sum is σ = 690204480. Its totient is φ = 58786560.

The previous prime is 221149967. The next prime is 221150021. The reversal of 221149980 is 89941122.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 291762 + ... + 292518.

It is an arithmetic number, because the mean of its divisors is an integer number (7189630).

Almost surely, 2^221149980 is an apocalyptic number.

221149980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221149980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345102240).

221149980 is an abundant number, since it is smaller than the sum of its proper divisors (469054500).

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

221149980 is a wasteful number, since it uses less digits than its factorization.

221149980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 221149980 is about 14871.1122650594. The cubic root of 221149980 is about 604.7310964902.

The spelling of 221149980 in words is "two hundred twenty-one million, one hundred forty-nine thousand, nine hundred eighty".