221609092 has 12 divisors (see below), whose sum is σ = 388089856. Its totient is φ = 110726280.

The previous prime is 221609081. The next prime is 221609131. The reversal of 221609092 is 290906122.

221609092 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221609092² = 98221179314128928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12948 + ... + 24715.

Almost surely, 2^221609092 is an apocalyptic number.

It is an amenable number.

221609092 is a deficient number, since it is larger than the sum of its proper divisors (166480764).

221609092 is a wasteful number, since it uses less digits than its factorization.

221609092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39138 (or 39136 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 221609092 is about 14886.5406323968. The cubic root of 221609092 is about 605.1492853834.

The spelling of 221609092 in words is "two hundred twenty-one million, six hundred nine thousand, ninety-two".