115451557 has 4 divisors (see below), whose sum is σ = 124332460. Its totient is φ = 106570656.

The previous prime is 115451549. The next prime is 115451561. The reversal of 115451557 is 755154511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755154511 = 59 ⋅12799229.

It can be written as a sum of positive squares in 2 ways, for example, as 26224641 + 89226916 = 5121^2 + 9446^2 .

It is a cyclic number.

It is not a de Polignac number, because 115451557 - 2³ = 115451549 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 (115451537) 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, 4440432 + ... + 4440457.

It is an arithmetic number, because the mean of its divisors is an integer number (31083115).

Almost surely, 2^115451557 is an apocalyptic number.

It is an amenable number.

115451557 is a deficient number, since it is larger than the sum of its proper divisors (8880903).

115451557 is an equidigital number, since it uses as much as digits as its factorization.

115451557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8880902.

The product of its digits is 17500, while the sum is 34.

The square root of 115451557 is about 10744.8386214033. The cubic root of 115451557 is about 486.9300735713.

The spelling of 115451557 in words is "one hundred fifteen million, four hundred fifty-one thousand, five hundred fifty-seven".