115431505 has 16 divisors (see below), whose sum is σ = 161539200. Its totient is φ = 79151856.

The previous prime is 115431499. The next prime is 115431521. The reversal of 115431505 is 505134511.

It is a happy number.

It is not a de Polignac number, because 115431505 - 2⁵ = 115431473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115431505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31939 + ... + 35368.

It is an arithmetic number, because the mean of its divisors is an integer number (10096200).

Almost surely, 2^115431505 is an apocalyptic number.

It is an amenable number.

115431505 is a deficient number, since it is larger than the sum of its proper divisors (46107695).

115431505 is an frugal number, since it uses more digits than its factorization.

115431505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67333 (or 67319 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 115431505 is about 10743.9054817138. The cubic root of 115431505 is about 486.9018814088.

The spelling of 115431505 in words is "one hundred fifteen million, four hundred thirty-one thousand, five hundred five".