1115522551 has 16 divisors (see below), whose sum is σ = 1313817120. Its totient is φ = 933765120.

The previous prime is 1115522533. The next prime is 1115522561. The reversal of 1115522551 is 1552255111.

It is a cyclic number.

It is not a de Polignac number, because 1115522551 - 2⁵ = 1115522519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115522501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48951 + ... + 68023.

It is an arithmetic number, because the mean of its divisors is an integer number (82113570).

Almost surely, 2^1115522551 is an apocalyptic number.

1115522551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1115522551 is a deficient number, since it is larger than the sum of its proper divisors (198294569).

1115522551 is a wasteful number, since it uses less digits than its factorization.

1115522551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19506.

The product of its digits is 2500, while the sum is 28.

The square root of 1115522551 is about 33399.4393815226. The cubic root of 1115522551 is about 1037.1130955071.

Adding to 1115522551 its reverse (1552255111), we get a palindrome (2667777662).

The spelling of 1115522551 in words is "one billion, one hundred fifteen million, five hundred twenty-two thousand, five hundred fifty-one".