1131553115 has 32 divisors (see below), whose sum is σ = 1695015936. Its totient is φ = 704511360.

The previous prime is 1131553069. The next prime is 1131553139. The reversal of 1131553115 is 5113551311.

It is not a de Polignac number, because 1131553115 - 2¹⁶ = 1131487579 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465794 + ... + 468216.

It is an arithmetic number, because the mean of its divisors is an integer number (52969248).

Almost surely, 2^1131553115 is an apocalyptic number.

1131553115 is a deficient number, since it is larger than the sum of its proper divisors (563462821).

1131553115 is a wasteful number, since it uses less digits than its factorization.

1131553115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659.

The product of its digits is 1125, while the sum is 26.

The square root of 1131553115 is about 33638.5658879804. The cubic root of 1131553115 is about 1042.0574147774.

The spelling of 1131553115 in words is "one billion, one hundred thirty-one million, five hundred fifty-three thousand, one hundred fifteen".