2115115052531 has 4 divisors (see below), whose sum is σ = 2277816210432. Its totient is φ = 1952413894632.

The previous prime is 2115115052509. The next prime is 2115115052573. The reversal of 2115115052531 is 1352505115112.

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 2115115052531 - 2¹⁰ = 2115115051507 is a prime.

It is a super-2 number, since 2×2115115052531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115115054531) 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, 81350578931 + ... + 81350578956.

It is an arithmetic number, because the mean of its divisors is an integer number (569454052608).

Almost surely, 2^{2115115052531} is an apocalyptic number.

2115115052531 is a deficient number, since it is larger than the sum of its proper divisors (162701157901).

2115115052531 is a wasteful number, since it uses less digits than its factorization.

2115115052531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162701157900.

The product of its (nonzero) digits is 7500, while the sum is 32.

The spelling of 2115115052531 in words is "two trillion, one hundred fifteen billion, one hundred fifteen million, fifty-two thousand, five hundred thirty-one".