1131455931 has 8 divisors (see below), whose sum is σ = 1511261520. Its totient is φ = 752977152.

The previous prime is 1131455881. The next prime is 1131455939. The reversal of 1131455931 is 1395541311.

1131455931 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1131455931 is a prime.

It is a super-2 number, since 2×1131455931² = 2560385047590153522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131455892 and 1131455901.

It is not an unprimeable number, because it can be changed into a prime (1131455939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329710 + ... + 333123.

It is an arithmetic number, because the mean of its divisors is an integer number (188907690).

Almost surely, 2^1131455931 is an apocalyptic number.

1131455931 is a deficient number, since it is larger than the sum of its proper divisors (379805589).

1131455931 is an equidigital number, since it uses as much as digits as its factorization.

1131455931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663405.

The product of its digits is 8100, while the sum is 33.

The square root of 1131455931 is about 33637.1213245129. The cubic root of 1131455931 is about 1042.0275813841.

The spelling of 1131455931 in words is "one billion, one hundred thirty-one million, four hundred fifty-five thousand, nine hundred thirty-one".