1031113157 has 2 divisors, whose sum is σ = 1031113158. Its totient is φ = 1031113156.

The previous prime is 1031113133. The next prime is 1031113231. The reversal of 1031113157 is 7513111301.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543542596 + 487570561 = 23314^2 + 22081^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031113157 - 2¹⁶ = 1031047621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031115157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515556578 + 515556579.

It is an arithmetic number, because the mean of its divisors is an integer number (515556579).

Almost surely, 2^1031113157 is an apocalyptic number.

It is an amenable number.

1031113157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031113157 is an equidigital number, since it uses as much as digits as its factorization.

1031113157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 315, while the sum is 23.

The square root of 1031113157 is about 32110.9507333557. The cubic root of 1031113157 is about 1010.2653150650.

Adding to 1031113157 its reverse (7513111301), we get a palindrome (8544224458).

The spelling of 1031113157 in words is "one billion, thirty-one million, one hundred thirteen thousand, one hundred fifty-seven".