1133811431 has 4 divisors (see below), whose sum is σ = 1134972912. Its totient is φ = 1132649952.

The previous prime is 1133811421. The next prime is 1133811449. The reversal of 1133811431 is 1341183311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1341183311 = 13 ⋅103167947.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1133811431 is a prime.

It is a super-2 number, since 2×1133811431² = 2571056722132535522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1133811431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133811421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579275 + ... + 581228.

It is an arithmetic number, because the mean of its divisors is an integer number (283743228).

Almost surely, 2^1133811431 is an apocalyptic number.

1133811431 is a deficient number, since it is larger than the sum of its proper divisors (1161481).

1133811431 is an equidigital number, since it uses as much as digits as its factorization.

1133811431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161480.

The product of its digits is 864, while the sum is 26.

The square root of 1133811431 is about 33672.1165209436. The cubic root of 1133811431 is about 1042.7501885979.

Adding to 1133811431 its reverse (1341183311), we get a palindrome (2474994742).

The spelling of 1133811431 in words is "one billion, one hundred thirty-three million, eight hundred eleven thousand, four hundred thirty-one".