221164151880 has 576 divisors, whose sum is σ = 841104622080. Its totient is φ = 46332518400.

The previous prime is 221164151863. The next prime is 221164151909. The reversal of 221164151880 is 88151461122.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 65801400 + ... + 65804760.

It is an arithmetic number, because the mean of its divisors is an integer number (1460251080).

Almost surely, 2^221164151880 is an apocalyptic number.

221164151880 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 221164151880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420552311040).

221164151880 is an abundant number, since it is smaller than the sum of its proper divisors (619940470200).

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

221164151880 is a wasteful number, since it uses less digits than its factorization.

221164151880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3458 (or 3428 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 39.

The spelling of 221164151880 in words is "two hundred twenty-one billion, one hundred sixty-four million, one hundred fifty-one thousand, eight hundred eighty".