1131142031 has 2 divisors, whose sum is σ = 1131142032. Its totient is φ = 1131142030.

The previous prime is 1131141959. The next prime is 1131142087. The reversal of 1131142031 is 1302411311.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131142031 is a prime.

It is a super-2 number, since 2×1131142031² = 2558964588589609922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131142931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565571015 + 565571016.

It is an arithmetic number, because the mean of its divisors is an integer number (565571016).

Almost surely, 2^1131142031 is an apocalyptic number.

1131142031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131142031 is an equidigital number, since it uses as much as digits as its factorization.

1131142031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1131142031 is about 33632.4550248714. The cubic root of 1131142031 is about 1041.9312091785.

Adding to 1131142031 its reverse (1302411311), we get a palindrome (2433553342).

The spelling of 1131142031 in words is "one billion, one hundred thirty-one million, one hundred forty-two thousand, thirty-one".