1031531113 has 2 divisors, whose sum is σ = 1031531114. Its totient is φ = 1031531112.

The previous prime is 1031531101. The next prime is 1031531141. The reversal of 1031531113 is 3111351301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 860366224 + 171164889 = 29332^2 + 13083^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031531113 - 2⁹ = 1031530601 is a prime.

It is not a weakly prime, because it can be changed into another prime (1031531143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515765556 + 515765557.

It is an arithmetic number, because the mean of its divisors is an integer number (515765557).

Almost surely, 2^1031531113 is an apocalyptic number.

It is an amenable number.

1031531113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031531113 is an equidigital number, since it uses as much as digits as its factorization.

1031531113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 1031531113 is about 32117.4580718960. The cubic root of 1031531113 is about 1010.4017984400.

Adding to 1031531113 its reverse (3111351301), we get a palindrome (4142882414).

The spelling of 1031531113 in words is "one billion, thirty-one million, five hundred thirty-one thousand, one hundred thirteen".