1215545215223 has 12 divisors (see below), whose sum is σ = 1305762412320. Its totient is φ = 1131188120832.

The previous prime is 1215545215217. The next prime is 1215545215229. The reversal of 1215545215223 is 3225125455121.

It is an interprime number because it is at equal distance from previous prime (1215545215217) and next prime (1215545215229).

It is not a de Polignac number, because 1215545215223 - 2³² = 1211250247927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215545215229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23603711 + ... + 23655152.

It is an arithmetic number, because the mean of its divisors is an integer number (108813534360).

Almost surely, 2^{1215545215223} is an apocalyptic number.

1215545215223 is a deficient number, since it is larger than the sum of its proper divisors (90217197097).

1215545215223 is an equidigital number, since it uses as much as digits as its factorization.

1215545215223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47258986 (or 47258969 counting only the distinct ones).

The product of its digits is 120000, while the sum is 38.

The spelling of 1215545215223 in words is "one trillion, two hundred fifteen billion, five hundred forty-five million, two hundred fifteen thousand, two hundred twenty-three".