221002092 has 18 divisors (see below), whose sum is σ = 558644268. Its totient is φ = 73667352.

The previous prime is 221002087. The next prime is 221002097. The reversal of 221002092 is 290200122.

221002092 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 an interprime number because it is at equal distance from previous prime (221002087) and next prime (221002097).

It is a tau number, because it is divible by the number of its divisors (18).

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

It is not an unprimeable number, because it can be changed into a prime (221002097) 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, 3069438 + ... + 3069509.

Almost surely, 2^221002092 is an apocalyptic number.

It is an amenable number.

221002092 is an abundant number, since it is smaller than the sum of its proper divisors (337642176).

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

221002092 is a wasteful number, since it uses less digits than its factorization.

221002092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6138957 (or 6138952 counting only the distinct ones).

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

The square root of 221002092 is about 14866.1391087262. The cubic root of 221002092 is about 604.5962673047.

The spelling of 221002092 in words is "two hundred twenty-one million, two thousand, ninety-two".