1131324031 has 4 divisors (see below), whose sum is σ = 1131667200. Its totient is φ = 1130980864.

The previous prime is 1131323993. The next prime is 1131324037. The reversal of 1131324031 is 1304231311.

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 1131324031 - 2⁷ = 1131323903 is a prime.

It is a super-2 number, since 2×1131324031² = 2559788126236177922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131324037) 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, 166591 + ... + 173248.

It is an arithmetic number, because the mean of its divisors is an integer number (282916800).

Almost surely, 2^1131324031 is an apocalyptic number.

1131324031 is a deficient number, since it is larger than the sum of its proper divisors (343169).

1131324031 is an equidigital number, since it uses as much as digits as its factorization.

1131324031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343168.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1131324031 is about 33635.1606358584. The cubic root of 1131324031 is about 1041.9870881944.

Adding to 1131324031 its reverse (1304231311), we get a palindrome (2435555342).

It can be divided in two parts, 11313 and 24031, that added together give a square (35344 = 188²).

The spelling of 1131324031 in words is "one billion, one hundred thirty-one million, three hundred twenty-four thousand, thirty-one".