115535551 has 4 divisors (see below), whose sum is σ = 115996104. Its totient is φ = 115075000.

The previous prime is 115535533. The next prime is 115535573. The reversal of 115535551 is 155535511.

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

It is a cyclic number.

It is not a de Polignac number, because 115535551 - 2¹⁹ = 115011263 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 (115535521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229900 + ... + 230401.

It is an arithmetic number, because the mean of its divisors is an integer number (28999026).

Almost surely, 2^115535551 is an apocalyptic number.

115535551 is a deficient number, since it is larger than the sum of its proper divisors (460553).

115535551 is an equidigital number, since it uses as much as digits as its factorization.

115535551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460552.

The product of its digits is 9375, while the sum is 31.

The square root of 115535551 is about 10748.7464850558. The cubic root of 115535551 is about 487.0481296959.

The spelling of 115535551 in words is "one hundred fifteen million, five hundred thirty-five thousand, five hundred fifty-one".