1215523015140 has 96 divisors (see below), whose sum is σ = 3901216161024. Its totient is φ = 277009367040.

The previous prime is 1215523015129. The next prime is 1215523015151. The reversal of 1215523015140 is 415103255121.

It is an interprime number because it is at equal distance from previous prime (1215523015129) and next prime (1215523015151).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1215523015098 and 1215523015107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4152381 + ... + 4435460.

It is an arithmetic number, because the mean of its divisors is an integer number (40637668344).

Almost surely, 2^{1215523015140} is an apocalyptic number.

1215523015140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215523015140 is an abundant number, since it is smaller than the sum of its proper divisors (2685693145884).

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

1215523015140 is a wasteful number, since it uses less digits than its factorization.

1215523015140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8588197 (or 8588195 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 1215523015140 in words is "one trillion, two hundred fifteen billion, five hundred twenty-three million, fifteen thousand, one hundred forty".