1215025203131 has 4 divisors (see below), whose sum is σ = 1216682809872. Its totient is φ = 1213367596392.

The previous prime is 1215025203083. The next prime is 1215025203137. The reversal of 1215025203131 is 1313025205121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1215025203131 - 2²² = 1215021008827 is a prime.

It is a super-2 number, since 2×1215025203131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1215025203131.

It is not an unprimeable number, because it can be changed into a prime (1215025203137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 828802271 + ... + 828803736.

It is an arithmetic number, because the mean of its divisors is an integer number (304170702468).

Almost surely, 2^{1215025203131} is an apocalyptic number.

1215025203131 is a deficient number, since it is larger than the sum of its proper divisors (1657606741).

1215025203131 is an equidigital number, since it uses as much as digits as its factorization.

1215025203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657606740.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 1215025203131 in words is "one trillion, two hundred fifteen billion, twenty-five million, two hundred three thousand, one hundred thirty-one".