1131559957 has 32 divisors (see below), whose sum is σ = 1313335296. Its totient is φ = 964920000.

The previous prime is 1131559939. The next prime is 1131559963. The reversal of 1131559957 is 7599551311.

It is a de Polignac number, because none of the positive numbers 2^k-1131559957 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 (1131559907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4508082 + ... + 4508332.

It is an arithmetic number, because the mean of its divisors is an integer number (41041728).

Almost surely, 2^1131559957 is an apocalyptic number.

It is an amenable number.

1131559957 is a deficient number, since it is larger than the sum of its proper divisors (181775339).

1131559957 is a wasteful number, since it uses less digits than its factorization.

1131559957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561.

The product of its digits is 212625, while the sum is 46.

The square root of 1131559957 is about 33638.6675865736. The cubic root of 1131559957 is about 1042.0595150596.

The spelling of 1131559957 in words is "one billion, one hundred thirty-one million, five hundred fifty-nine thousand, nine hundred fifty-seven".