1031231231 has 4 divisors (see below), whose sum is σ = 1036574592. Its totient is φ = 1025887872.

The previous prime is 1031231209. The next prime is 1031231239. The reversal of 1031231231 is 1321321301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1031231231 - 2⁶ = 1031231167 is a prime.

It is a super-2 number, since 2×1031231231² = 2126875703579550722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031231239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2671391 + ... + 2671776.

It is an arithmetic number, because the mean of its divisors is an integer number (259143648).

Almost surely, 2^1031231231 is an apocalyptic number.

1031231231 is a deficient number, since it is larger than the sum of its proper divisors (5343361).

1031231231 is an equidigital number, since it uses as much as digits as its factorization.

1031231231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5343360.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1031231231 is about 32112.7892123995. The cubic root of 1031231231 is about 1010.3038758227.

Adding to 1031231231 its reverse (1321321301), we get a palindrome (2352552532).

The spelling of 1031231231 in words is "one billion, thirty-one million, two hundred thirty-one thousand, two hundred thirty-one".