1216362431515 has 32 divisors (see below), whose sum is σ = 1820120979456. Its totient is φ = 758120069760.

The previous prime is 1216362431387. The next prime is 1216362431561. The reversal of 1216362431515 is 5151342636121.

It is not a de Polignac number, because 1216362431515 - 2⁷ = 1216362431387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1966254 + ... + 2509756.

It is an arithmetic number, because the mean of its divisors is an integer number (56878780608).

Almost surely, 2^{1216362431515} is an apocalyptic number.

1216362431515 is a deficient number, since it is larger than the sum of its proper divisors (603758547941).

1216362431515 is a wasteful number, since it uses less digits than its factorization.

1216362431515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549339.

The product of its digits is 129600, while the sum is 40.

The spelling of 1216362431515 in words is "one trillion, two hundred sixteen billion, three hundred sixty-two million, four hundred thirty-one thousand, five hundred fifteen".