1215157679430 has 32 divisors (see below), whose sum is σ = 2933841786624. Its totient is φ = 322101674976.

The previous prime is 1215157679423. The next prime is 1215157679471. The reversal of 1215157679430 is 349767515121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121268212 + ... + 121278231.

It is an arithmetic number, because the mean of its divisors is an integer number (91682555832).

Almost surely, 2^{1215157679430} is an apocalyptic number.

1215157679430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215157679430 is an abundant number, since it is smaller than the sum of its proper divisors (1718684107194).

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

1215157679430 is a wasteful number, since it uses less digits than its factorization.

1215157679430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242546620.

The product of its (nonzero) digits is 1587600, while the sum is 51.

The spelling of 1215157679430 in words is "one trillion, two hundred fifteen billion, one hundred fifty-seven million, six hundred seventy-nine thousand, four hundred thirty".