2115231212550 has 48 divisors (see below), whose sum is σ = 5387551080912. Its totient is φ = 548816745600.

The previous prime is 2115231212527. The next prime is 2115231212581. The reversal of 2115231212550 is 552121325112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190555821 + ... + 190566920.

It is an arithmetic number, because the mean of its divisors is an integer number (112240647519).

Almost surely, 2^{2115231212550} is an apocalyptic number.

2115231212550 is an abundant number, since it is smaller than the sum of its proper divisors (3272319868362).

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

2115231212550 is a wasteful number, since it uses less digits than its factorization.

2115231212550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381122793 (or 381122788 counting only the distinct ones).

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

Adding to 2115231212550 its reverse (552121325112), we get a palindrome (2667352537662).

The spelling of 2115231212550 in words is "two trillion, one hundred fifteen billion, two hundred thirty-one million, two hundred twelve thousand, five hundred fifty".