221200092 has 24 divisors (see below), whose sum is σ = 573482000. Its totient is φ = 73733328.

The previous prime is 221200069. The next prime is 221200093. The reversal of 221200092 is 290002122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1023967 + ... + 1024182.

Almost surely, 2^221200092 is an apocalyptic number.

It is an amenable number.

221200092 is an abundant number, since it is smaller than the sum of its proper divisors (352281908).

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

221200092 is a wasteful number, since it uses less digits than its factorization.

221200092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048162 (or 2048154 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 221200092 is about 14872.7970469579. The cubic root of 221200092 is about 604.7767698623.

The spelling of 221200092 in words is "two hundred twenty-one million, two hundred thousand, ninety-two".