221077080 has 128 divisors (see below), whose sum is σ = 842227200. Its totient is φ = 50530176.

The previous prime is 221077067. The next prime is 221077099. The reversal of 221077080 is 80770122.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 7062 + ... + 22181.

It is an arithmetic number, because the mean of its divisors is an integer number (6579900).

Almost surely, 2^221077080 is an apocalyptic number.

221077080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221077080 is an abundant number, since it is smaller than the sum of its proper divisors (621150120).

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

221077080 is a wasteful number, since it uses less digits than its factorization.

221077080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29270 (or 29260 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 221077080 is about 14868.6610022557. The cubic root of 221077080 is about 604.6646412247.

The spelling of 221077080 in words is "two hundred twenty-one million, seventy-seven thousand, eighty".