221475700 has 18 divisors (see below), whose sum is σ = 480602486. Its totient is φ = 88590240.

The previous prime is 221475691. The next prime is 221475701. The reversal of 221475700 is 7574122.

221475700 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 68359824 + 153115876 = 8268^2 + 12374^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221475701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1107279 + ... + 1107478.

Almost surely, 2^221475700 is an apocalyptic number.

221475700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221475700 is an abundant number, since it is smaller than the sum of its proper divisors (259126786).

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

221475700 is a wasteful number, since it uses less digits than its factorization.

221475700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214771 (or 2214764 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 221475700 is about 14882.0596692797. The cubic root of 221475700 is about 605.0278429005.

The spelling of 221475700 in words is "two hundred twenty-one million, four hundred seventy-five thousand, seven hundred".