1115135551 has 4 divisors (see below), whose sum is σ = 1115852400. Its totient is φ = 1114418704.

The previous prime is 1115135531. The next prime is 1115135561. The reversal of 1115135551 is 1555315111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115135551 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 (1115135531) 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, 356086 + ... + 359203.

It is an arithmetic number, because the mean of its divisors is an integer number (278963100).

Almost surely, 2^1115135551 is an apocalyptic number.

1115135551 is a deficient number, since it is larger than the sum of its proper divisors (716849).

1115135551 is an equidigital number, since it uses as much as digits as its factorization.

1115135551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716848.

The product of its digits is 1875, while the sum is 28.

The square root of 1115135551 is about 33393.6453685428. The cubic root of 1115135551 is about 1036.9931489730.

The spelling of 1115135551 in words is "one billion, one hundred fifteen million, one hundred thirty-five thousand, five hundred fifty-one".