1031321231 has 16 divisors (see below), whose sum is σ = 1063692000. Its totient is φ = 999618048.

The previous prime is 1031321191. The next prime is 1031321233. The reversal of 1031321231 is 1321231301.

It is a cyclic number.

It is not a de Polignac number, because 1031321231 - 2¹⁸ = 1031059087 is a prime.

It is a super-2 number, since 2×1031321231² = 2127246963022710722, 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 (1031321233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1100195 + ... + 1101131.

It is an arithmetic number, because the mean of its divisors is an integer number (66480750).

Almost surely, 2^1031321231 is an apocalyptic number.

1031321231 is a deficient number, since it is larger than the sum of its proper divisors (32370769).

1031321231 is an equidigital number, since it uses as much as digits as its factorization.

1031321231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258.

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

The square root of 1031321231 is about 32114.1904926778. The cubic root of 1031321231 is about 1010.3332661608. Note that the first 3 decimals are identical.

Adding to 1031321231 its reverse (1321231301), we get a palindrome (2352552532).

The spelling of 1031321231 in words is "one billion, thirty-one million, three hundred twenty-one thousand, two hundred thirty-one".