115431643 has 4 divisors (see below), whose sum is σ = 115453840. Its totient is φ = 115409448.

The previous prime is 115431623. The next prime is 115431653. The reversal of 115431643 is 346134511.

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 115431643 - 2²¹ = 113334491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115431623) 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, 1378 + ... + 15256.

It is an arithmetic number, because the mean of its divisors is an integer number (28863460).

Almost surely, 2^115431643 is an apocalyptic number.

115431643 is a deficient number, since it is larger than the sum of its proper divisors (22197).

115431643 is an equidigital number, since it uses as much as digits as its factorization.

115431643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22196.

The product of its digits is 4320, while the sum is 28.

The square root of 115431643 is about 10743.9119039575. The cubic root of 115431643 is about 486.9020754414.

The spelling of 115431643 in words is "one hundred fifteen million, four hundred thirty-one thousand, six hundred forty-three".