1215157679431 has 8 divisors (see below), whose sum is σ = 1243449451904. Its totient is φ = 1186867374840.

The previous prime is 1215157679423. The next prime is 1215157679471. The reversal of 1215157679431 is 1349767515121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1215157679431 - 2³ = 1215157679423 is a prime.

It is a super-2 number, since 2×1215157679431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215157679471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1406590 + ... + 2099716.

It is an arithmetic number, because the mean of its divisors is an integer number (155431181488).

Almost surely, 2^{1215157679431} is an apocalyptic number.

1215157679431 is a deficient number, since it is larger than the sum of its proper divisors (28291772473).

1215157679431 is an equidigital number, since it uses as much as digits as its factorization.

1215157679431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733941.

The product of its digits is 1587600, while the sum is 52.

The spelling of 1215157679431 in words is "one trillion, two hundred fifteen billion, one hundred fifty-seven million, six hundred seventy-nine thousand, four hundred thirty-one".