13215404330555 has 96 divisors (see below), whose sum is σ = 20216595274560. Its totient is φ = 8238583664640.

The previous prime is 13215404330537. The next prime is 13215404330573. The reversal of 13215404330555 is 55503340451231.

It is an interprime number because it is at equal distance from previous prime (13215404330537) and next prime (13215404330573).

It is not a de Polignac number, because 13215404330555 - 2⁸ = 13215404330299 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12047615 + ... + 13098695.

It is an arithmetic number, because the mean of its divisors is an integer number (210589534110).

Almost surely, 2^{13215404330555} is an apocalyptic number.

13215404330555 is a deficient number, since it is larger than the sum of its proper divisors (7001190944005).

13215404330555 is a wasteful number, since it uses less digits than its factorization.

13215404330555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051229 (or 1051222 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 41.

Adding to 13215404330555 its reverse (55503340451231), we get a palindrome (68718744781786).

The spelling of 13215404330555 in words is "thirteen trillion, two hundred fifteen billion, four hundred four million, three hundred thirty thousand, five hundred fifty-five".