1031320231 has 2 divisors, whose sum is σ = 1031320232. Its totient is φ = 1031320230.

The previous prime is 1031320219. The next prime is 1031320267. The reversal of 1031320231 is 1320231301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1031320231 - 2¹⁵ = 1031287463 is a prime.

It is a super-2 number, since 2×1031320231² = 2127242837739786722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031320291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515660115 + 515660116.

It is an arithmetic number, because the mean of its divisors is an integer number (515660116).

Almost surely, 2^1031320231 is an apocalyptic number.

1031320231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031320231 is an equidigital number, since it uses as much as digits as its factorization.

1031320231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1031320231 is about 32114.1749232329. The cubic root of 1031320231 is about 1010.3329396109.

Adding to 1031320231 its reverse (1320231301), we get a palindrome (2351551532).

The spelling of 1031320231 in words is "one billion, thirty-one million, three hundred twenty thousand, two hundred thirty-one".