115312251 has 4 divisors (see below), whose sum is σ = 153749672. Its totient is φ = 76874832.

The previous prime is 115312229. The next prime is 115312277. The reversal of 115312251 is 152213511.

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

It is not a de Polignac number, because 115312251 - 2¹¹ = 115310203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115312151) 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, 19218706 + ... + 19218711.

It is an arithmetic number, because the mean of its divisors is an integer number (38437418).

Almost surely, 2^115312251 is an apocalyptic number.

115312251 is a deficient number, since it is larger than the sum of its proper divisors (38437421).

115312251 is an equidigital number, since it uses as much as digits as its factorization.

115312251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38437420.

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

The square root of 115312251 is about 10738.3542035081. The cubic root of 115312251 is about 486.7341484478.

Adding to 115312251 its reverse (152213511), we get a palindrome (267525762).

The spelling of 115312251 in words is "one hundred fifteen million, three hundred twelve thousand, two hundred fifty-one".