1521947992 has 16 divisors (see below), whose sum is σ = 2881908000. Its totient is φ = 753439200.

The previous prime is 1521947989. The next prime is 1521948041. The reversal of 1521947992 is 2997491251.

It is a congruent number.

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, 940992 + ... + 942607.

It is an arithmetic number, because the mean of its divisors is an integer number (180119250).

Almost surely, 2^1521947992 is an apocalyptic number.

It is an amenable number.

1521947992 is a deficient number, since it is larger than the sum of its proper divisors (1359960008).

1521947992 is a wasteful number, since it uses less digits than its factorization.

1521947992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883706 (or 1883702 counting only the distinct ones).

The product of its digits is 408240, while the sum is 49.

The square root of 1521947992 is about 39012.1518504171. The cubic root of 1521947992 is about 1150.2703817929.

The spelling of 1521947992 in words is "one billion, five hundred twenty-one million, nine hundred forty-seven thousand, nine hundred ninety-two".