115400553 has 4 divisors (see below), whose sum is σ = 153867408. Its totient is φ = 76933700.

The previous prime is 115400543. The next prime is 115400563. The reversal of 115400553 is 355004511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 355004511 = 3 ⋅118334837.

It is an interprime number because it is at equal distance from previous prime (115400543) and next prime (115400563).

It is a cyclic number.

It is not a de Polignac number, because 115400553 - 2⁹ = 115400041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115400543) 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, 19233423 + ... + 19233428.

It is an arithmetic number, because the mean of its divisors is an integer number (38466852).

Almost surely, 2^115400553 is an apocalyptic number.

It is an amenable number.

115400553 is a deficient number, since it is larger than the sum of its proper divisors (38466855).

115400553 is an equidigital number, since it uses as much as digits as its factorization.

115400553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38466854.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 115400553 is about 10742.4649405991. The cubic root of 115400553 is about 486.8583579523.

The spelling of 115400553 in words is "one hundred fifteen million, four hundred thousand, five hundred fifty-three".