1516221992 has 16 divisors (see below), whose sum is σ = 2843877300. Its totient is φ = 757854720.

The previous prime is 1516221991. The next prime is 1516222009. The reversal of 1516221992 is 2991226151.

It can be written as a sum of positive squares in 2 ways, for example, as 1119973156 + 396248836 = 33466^2 + 19906^2 .

It is not an unprimeable number, because it can be changed into a prime (1516221991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5609 + ... + 55352.

Almost surely, 2^1516221992 is an apocalyptic number.

It is an amenable number.

1516221992 is a deficient number, since it is larger than the sum of its proper divisors (1327655308).

1516221992 is a wasteful number, since it uses less digits than its factorization.

1516221992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64076 (or 64072 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The square root of 1516221992 is about 38938.6953042857. The cubic root of 1516221992 is about 1148.8260211057.

The spelling of 1516221992 in words is "one billion, five hundred sixteen million, two hundred twenty-one thousand, nine hundred ninety-two".