1131364631 has 4 divisors (see below), whose sum is σ = 1138857264. Its totient is φ = 1123872000.

The previous prime is 1131364571. The next prime is 1131364643. The reversal of 1131364631 is 1364631311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131364631 - 2¹⁴ = 1131348247 is a prime.

It is a super-2 number, since 2×1131364631² = 2559971856555532322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131364594 and 1131364603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131364681) 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, 3746090 + ... + 3746391.

It is an arithmetic number, because the mean of its divisors is an integer number (284714316).

Almost surely, 2^1131364631 is an apocalyptic number.

1131364631 is a deficient number, since it is larger than the sum of its proper divisors (7492633).

1131364631 is an equidigital number, since it uses as much as digits as its factorization.

1131364631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7492632.

The product of its digits is 3888, while the sum is 29.

The square root of 1131364631 is about 33635.7641655426. The cubic root of 1131364631 is about 1041.9995526957. Note that the first 3 decimals are identical.

Adding to 1131364631 its reverse (1364631311), we get a palindrome (2495995942).

The spelling of 1131364631 in words is "one billion, one hundred thirty-one million, three hundred sixty-four thousand, six hundred thirty-one".