115451109 has 8 divisors (see below), whose sum is σ = 171038720. Its totient is φ = 76967388.

The previous prime is 115451093. The next prime is 115451111. The reversal of 115451109 is 901154511.

115451109 is a `hidden beast` number, since 1 + 1 + 545 + 110 + 9 = 666.

It is not a de Polignac number, because 115451109 - 2⁴ = 115451093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4275967 = 115451109 / (1 + 1 + 5 + 4 + 5 + 1 + 1 + 0 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115451159) 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, 2137957 + ... + 2138010.

It is an arithmetic number, because the mean of its divisors is an integer number (21379840).

Almost surely, 2^115451109 is an apocalyptic number.

It is an amenable number.

115451109 is a deficient number, since it is larger than the sum of its proper divisors (55587611).

115451109 is an equidigital number, since it uses as much as digits as its factorization.

115451109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275976 (or 4275970 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The square root of 115451109 is about 10744.8177741644. The cubic root of 115451109 is about 486.9294437401.

The spelling of 115451109 in words is "one hundred fifteen million, four hundred fifty-one thousand, one hundred nine".