2115512231 has 12 divisors (see below), whose sum is σ = 2590424280. Its totient is φ = 1717858800.

The previous prime is 2115512207. The next prime is 2115512233. The reversal of 2115512231 is 1322155112.

It is not a de Polignac number, because 2115512231 - 2⁶ = 2115512167 is a prime.

It is a super-2 number, since 2×2115512231² = 8950783999021194722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2115512197 and 2115512206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115512233) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1135220 + ... + 1137081.

It is an arithmetic number, because the mean of its divisors is an integer number (215868690).

Almost surely, 2^2115512231 is an apocalyptic number.

2115512231 is a deficient number, since it is larger than the sum of its proper divisors (474912049).

2115512231 is a wasteful number, since it uses less digits than its factorization.

2115512231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272334 (or 2272327 counting only the distinct ones).

The product of its digits is 600, while the sum is 23.

The square root of 2115512231 is about 45994.6978574705. The cubic root of 2115512231 is about 1283.7245503327.

Adding to 2115512231 its reverse (1322155112), we get a palindrome (3437667343).

The spelling of 2115512231 in words is "two billion, one hundred fifteen million, five hundred twelve thousand, two hundred thirty-one".