1031131019 has 2 divisors, whose sum is σ = 1031131020. Its totient is φ = 1031131018.

The previous prime is 1031130977. The next prime is 1031131027. The reversal of 1031131019 is 9101311301.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031131019 is a prime.

It is a super-2 number, since 2×1031131019² = 2126462356687956722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1031131819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515565509 + 515565510.

It is an arithmetic number, because the mean of its divisors is an integer number (515565510).

Almost surely, 2^1031131019 is an apocalyptic number.

1031131019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031131019 is an equidigital number, since it uses as much as digits as its factorization.

1031131019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 1031131019 is about 32111.2288615680. The cubic root of 1031131019 is about 1010.2711486487.

The spelling of 1031131019 in words is "one billion, thirty-one million, one hundred thirty-one thousand, nineteen".