1215291915223 has 16 divisors (see below), whose sum is σ = 1295135624160. Its totient is φ = 1136381654016.

The previous prime is 1215291915193. The next prime is 1215291915319. The reversal of 1215291915223 is 3225191925121.

It is not a de Polignac number, because 1215291915223 - 2³⁷ = 1077852961751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1215291915223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215291915023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7839993 + ... + 7993501.

It is an arithmetic number, because the mean of its divisors is an integer number (80945976510).

Almost surely, 2^{1215291915223} is an apocalyptic number.

1215291915223 is a deficient number, since it is larger than the sum of its proper divisors (79843708937).

1215291915223 is a wasteful number, since it uses less digits than its factorization.

1215291915223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156546.

The product of its digits is 97200, while the sum is 43.

The spelling of 1215291915223 in words is "one trillion, two hundred fifteen billion, two hundred ninety-one million, nine hundred fifteen thousand, two hundred twenty-three".