1131656331 has 16 divisors (see below), whose sum is σ = 1649199104. Its totient is φ = 686008224.

The previous prime is 1131656297. The next prime is 1131656381. The reversal of 1131656331 is 1336561311.

It is not a de Polignac number, because 1131656331 - 2¹⁴ = 1131639947 is a prime.

It is a super-2 number, since 2×1131656331² = 2561292102984763122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131656381) 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, 213931 + ... + 219156.

It is an arithmetic number, because the mean of its divisors is an integer number (103074944).

Almost surely, 2^1131656331 is an apocalyptic number.

1131656331 is a deficient number, since it is larger than the sum of its proper divisors (517542773).

1131656331 is a wasteful number, since it uses less digits than its factorization.

1131656331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433170.

The product of its digits is 4860, while the sum is 30.

The square root of 1131656331 is about 33640.1000444410. The cubic root of 1131656331 is about 1042.0890979942.

The spelling of 1131656331 in words is "one billion, one hundred thirty-one million, six hundred fifty-six thousand, three hundred thirty-one".