1115489551 has 12 divisors (see below), whose sum is σ = 1229189112. Its totient is φ = 1003940000.

The previous prime is 1115489533. The next prime is 1115489651. The reversal of 1115489551 is 1559845111.

It is not a de Polignac number, because 1115489551 - 2⁷ = 1115489423 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 (1115489651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107241 + ... + 117181.

It is an arithmetic number, because the mean of its divisors is an integer number (102432426).

Almost surely, 2^1115489551 is an apocalyptic number.

1115489551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1115489551 is a deficient number, since it is larger than the sum of its proper divisors (113699561).

1115489551 is an equidigital number, since it uses as much as digits as its factorization.

1115489551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10154 (or 10053 counting only the distinct ones).

The product of its digits is 36000, while the sum is 40.

The square root of 1115489551 is about 33398.9453576007. The cubic root of 1115489551 is about 1037.1028685901.

The spelling of 1115489551 in words is "one billion, one hundred fifteen million, four hundred eighty-nine thousand, five hundred fifty-one".