115512231 has 8 divisors (see below), whose sum is σ = 158984704. Its totient is φ = 74523960.

The previous prime is 115512227. The next prime is 115512239. The reversal of 115512231 is 132215511.

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

It is not a de Polignac number, because 115512231 - 2² = 115512227 is a prime.

It is a super-2 number, since 2×115512231² = 26686151021194722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115512198 and 115512207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115512239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620941 + ... + 621126.

It is an arithmetic number, because the mean of its divisors is an integer number (19873088).

Almost surely, 2^115512231 is an apocalyptic number.

115512231 is a deficient number, since it is larger than the sum of its proper divisors (43472473).

115512231 is a wasteful number, since it uses less digits than its factorization.

115512231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242101.

The product of its digits is 300, while the sum is 21.

The square root of 115512231 is about 10747.6616526573. The cubic root of 115512231 is about 487.0153584650.

Adding to 115512231 its reverse (132215511), we get a palindrome (247727742).

The spelling of 115512231 in words is "one hundred fifteen million, five hundred twelve thousand, two hundred thirty-one".