221373700 has 36 divisors (see below), whose sum is σ = 484191232. Its totient is φ = 87847200.

The previous prime is 221373671. The next prime is 221373703. The reversal of 221373700 is 7373122.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (221373703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3985 + ... + 21415.

Almost surely, 2^221373700 is an apocalyptic number.

221373700 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 221373700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242095616).

221373700 is an abundant number, since it is smaller than the sum of its proper divisors (262817532).

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

221373700 is a wasteful number, since it uses less digits than its factorization.

221373700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17572 (or 17565 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 221373700 is about 14878.6323296195. The cubic root of 221373700 is about 604.9349473574.

The spelling of 221373700 in words is "two hundred twenty-one million, three hundred seventy-three thousand, seven hundred".