221061480 has 64 divisors (see below), whose sum is σ = 664191360. Its totient is φ = 58860288.

The previous prime is 221061479. The next prime is 221061481. The reversal of 221061480 is 84160122.

It is an interprime number because it is at equal distance from previous prime (221061479) and next prime (221061481).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 221061480.

It is not an unprimeable number, because it can be changed into a prime (221061481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126694 + ... + 128426.

It is an arithmetic number, because the mean of its divisors is an integer number (10377990).

Almost surely, 2^221061480 is an apocalyptic number.

221061480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221061480 is an abundant number, since it is smaller than the sum of its proper divisors (443129880).

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

221061480 is a wasteful number, since it uses less digits than its factorization.

221061480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810 (or 2806 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 221061480 is about 14868.1363996972. The cubic root of 221061480 is about 604.6504184473.

The spelling of 221061480 in words is "two hundred twenty-one million, sixty-one thousand, four hundred eighty".