2115532531 has 8 divisors (see below), whose sum is σ = 2418059520. Its totient is φ = 1813082568.

The previous prime is 2115532519. The next prime is 2115532579. The reversal of 2115532531 is 1352355112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2115532531 - 2¹³ = 2115524339 is a prime.

It is a super-2 number, since 2×2115532531² = 8950955779438531922, which 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 2115532531.

It is not an unprimeable number, because it can be changed into a prime (2115532511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63090 + ... + 90616.

It is an arithmetic number, because the mean of its divisors is an integer number (302257440).

Almost surely, 2^2115532531 is an apocalyptic number.

2115532531 is a deficient number, since it is larger than the sum of its proper divisors (302526989).

2115532531 is a wasteful number, since it uses less digits than its factorization.

2115532531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38513.

The product of its digits is 4500, while the sum is 28.

The square root of 2115532531 is about 45994.9185345512. The cubic root of 2115532531 is about 1283.7286564344.

Adding to 2115532531 its reverse (1352355112), we get a palindrome (3467887643).

The spelling of 2115532531 in words is "two billion, one hundred fifteen million, five hundred thirty-two thousand, five hundred thirty-one".