1115431755 has 16 divisors (see below), whose sum is σ = 1787143200. Its totient is φ = 594079488.

The previous prime is 1115431747. The next prime is 1115431763. The reversal of 1115431755 is 5571345111.

It is an interprime number because it is at equal distance from previous prime (1115431747) and next prime (1115431763).

It is not a de Polignac number, because 1115431755 - 2³ = 1115431747 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39730 + ... + 61719.

It is an arithmetic number, because the mean of its divisors is an integer number (111696450).

Almost surely, 2^1115431755 is an apocalyptic number.

1115431755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1115431755 is a deficient number, since it is larger than the sum of its proper divisors (671711445).

1115431755 is a wasteful number, since it uses less digits than its factorization.

1115431755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102190.

The product of its digits is 10500, while the sum is 33.

The square root of 1115431755 is about 33398.0801094913. The cubic root of 1115431755 is about 1037.0849567436.

Adding to 1115431755 its reverse (5571345111), we get a palindrome (6686776866).

The spelling of 1115431755 in words is "one billion, one hundred fifteen million, four hundred thirty-one thousand, seven hundred fifty-five".