1531979712 has 42 divisors (see below), whose sum is σ = 4391144888. Its totient is φ = 510659712.

The previous prime is 1531979693. The next prime is 1531979717. The reversal of 1531979712 is 2179791351.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531979717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1329268 + ... + 1330419.

Almost surely, 2^1531979712 is an apocalyptic number.

1531979712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1531979712 is an abundant number, since it is smaller than the sum of its proper divisors (2859165176).

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

1531979712 is a wasteful number, since it uses less digits than its factorization.

1531979712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659705 (or 2659692 counting only the distinct ones).

The product of its digits is 119070, while the sum is 45.

The square root of 1531979712 is about 39140.5124136105. The cubic root of 1531979712 is about 1152.7921345882.

The spelling of 1531979712 in words is "one billion, five hundred thirty-one million, nine hundred seventy-nine thousand, seven hundred twelve".