1117381231 has 2 divisors, whose sum is σ = 1117381232. Its totient is φ = 1117381230.

The previous prime is 1117381217. The next prime is 1117381249. The reversal of 1117381231 is 1321837111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1117381231 - 2¹⁹ = 1116856943 is a prime.

It is a super-2 number, since 2×1117381231² = 2497081630782150722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1117381231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1117381201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558690615 + 558690616.

It is an arithmetic number, because the mean of its divisors is an integer number (558690616).

Almost surely, 2^1117381231 is an apocalyptic number.

1117381231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117381231 is an equidigital number, since it uses as much as digits as its factorization.

1117381231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 28.

The square root of 1117381231 is about 33427.2528186209. The cubic root of 1117381231 is about 1037.6887873612.

The spelling of 1117381231 in words is "one billion, one hundred seventeen million, three hundred eighty-one thousand, two hundred thirty-one".