1031043221 has 8 divisors (see below), whose sum is σ = 1140364344. Its totient is φ = 926009280.

The previous prime is 1031043199. The next prime is 1031043239. The reversal of 1031043221 is 1223401301.

It can be written as a sum of positive squares in 4 ways, for example, as 76912900 + 954130321 = 8770^2 + 30889^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031043221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1031043221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031045221) 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 in 7 ways as a sum of consecutive naturals, for example, 1071290 + ... + 1072251.

It is an arithmetic number, because the mean of its divisors is an integer number (142545543).

Almost surely, 2^1031043221 is an apocalyptic number.

It is an amenable number.

1031043221 is a deficient number, since it is larger than the sum of its proper divisors (109321123).

1031043221 is a wasteful number, since it uses less digits than its factorization.

1031043221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143591.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1031043221 is about 32109.8617405930. The cubic root of 1031043221 is about 1010.2424738886.

Adding to 1031043221 its reverse (1223401301), we get a palindrome (2254444522).

The spelling of 1031043221 in words is "one billion, thirty-one million, forty-three thousand, two hundred twenty-one".