1215717952 has 28 divisors (see below), whose sum is σ = 2413595376. Its totient is φ = 607568000.

The previous prime is 1215717949. The next prime is 1215717967. The reversal of 1215717952 is 2597175121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205143 + ... + 210985.

Almost surely, 2^1215717952 is an apocalyptic number.

It is an amenable number.

1215717952 is a deficient number, since it is larger than the sum of its proper divisors (1197877424).

1215717952 is an equidigital number, since it uses as much as digits as its factorization.

1215717952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9106 (or 9096 counting only the distinct ones).

The product of its digits is 44100, while the sum is 40.

The square root of 1215717952 is about 34867.1471732346. The cubic root of 1215717952 is about 1067.2781292755.

The spelling of 1215717952 in words is "one billion, two hundred fifteen million, seven hundred seventeen thousand, nine hundred fifty-two".