115431205 has 4 divisors (see below), whose sum is σ = 138517452. Its totient is φ = 92344960.

The previous prime is 115431187. The next prime is 115431209. The reversal of 115431205 is 502134511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17994564 + 97436641 = 4242^2 + 9871^2 .

It is a de Polignac number, because none of the positive numbers 2^k-115431205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115431209) 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, 11543116 + ... + 11543125.

It is an arithmetic number, because the mean of its divisors is an integer number (34629363).

Almost surely, 2^115431205 is an apocalyptic number.

It is an amenable number.

115431205 is a deficient number, since it is larger than the sum of its proper divisors (23086247).

115431205 is an equidigital number, since it uses as much as digits as its factorization.

115431205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23086246.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 115431205 is about 10743.8915203012. The cubic root of 115431205 is about 486.9014595982.

Adding to 115431205 its reverse (502134511), we get a palindrome (617565716).

The spelling of 115431205 in words is "one hundred fifteen million, four hundred thirty-one thousand, two hundred five".