221308092 has 24 divisors (see below), whose sum is σ = 573762000. Its totient is φ = 73769328.

The previous prime is 221308079. The next prime is 221308117. The reversal of 221308092 is 290803122.

It is a happy number.

221308092 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 1024467 + ... + 1024682.

It is an arithmetic number, because the mean of its divisors is an integer number (23906750).

Almost surely, 2^221308092 is an apocalyptic number.

It is an amenable number.

221308092 is an abundant number, since it is smaller than the sum of its proper divisors (352453908).

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

221308092 is a wasteful number, since it uses less digits than its factorization.

221308092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049162 (or 2049154 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 221308092 is about 14876.4273936991. The cubic root of 221308092 is about 604.8751804060.

The spelling of 221308092 in words is "two hundred twenty-one million, three hundred eight thousand, ninety-two".