221736080 has 40 divisors (see below), whose sum is σ = 542673600. Its totient is φ = 84025728.

The previous prime is 221736029. The next prime is 221736127. The reversal of 221736080 is 80637122.

It is a happy number.

221736080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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, 71420 + ... + 74459.

It is an arithmetic number, because the mean of its divisors is an integer number (13566840).

Almost surely, 2^221736080 is an apocalyptic number.

221736080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221736080 is an abundant number, since it is smaller than the sum of its proper divisors (320937520).

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

221736080 is a wasteful number, since it uses less digits than its factorization.

221736080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145911 (or 145905 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 221736080 is about 14890.8052166429. The cubic root of 221736080 is about 605.2648522779.

The spelling of 221736080 in words is "two hundred twenty-one million, seven hundred thirty-six thousand, eighty".