7221992 has 16 divisors (see below), whose sum is σ = 13797540. Its totient is φ = 3542656.

The previous prime is 7221983. The next prime is 7222001. The reversal of 7221992 is 2991227.

It is an interprime number because it is at equal distance from previous prime (7221983) and next prime (7222001).

It can be written as a sum of positive squares in 2 ways, for example, as 7214596 + 7396 = 2686^2 + 86^2 .

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, 8093 + ... + 8940.

Almost surely, 2^7221992 is an apocalyptic number.

It is an amenable number.

7221992 is a deficient number, since it is larger than the sum of its proper divisors (6575548).

7221992 is a wasteful number, since it uses less digits than its factorization.

7221992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17092 (or 17088 counting only the distinct ones).

The product of its digits is 4536, while the sum is 32.

The square root of 7221992 is about 2687.3764157632. The cubic root of 7221992 is about 193.2942793357.

The spelling of 7221992 in words is "seven million, two hundred twenty-one thousand, nine hundred ninety-two".