1140113231 has 4 divisors (see below), whose sum is σ = 1140863352. Its totient is φ = 1139363112.

The previous prime is 1140113213. The next prime is 1140113237. The reversal of 1140113231 is 1323110411.

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 1140113231 - 2¹⁸ = 1139851087 is a prime.

It is a super-2 number, since 2×1140113231² = 2599716359002518722, 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 (1140113237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372776 + ... + 375821.

It is an arithmetic number, because the mean of its divisors is an integer number (285215838).

Almost surely, 2^1140113231 is an apocalyptic number.

1140113231 is a deficient number, since it is larger than the sum of its proper divisors (750121).

1140113231 is an equidigital number, since it uses as much as digits as its factorization.

1140113231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750120.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1140113231 is about 33765.5627970274. The cubic root of 1140113231 is about 1044.6785122493.

Adding to 1140113231 its reverse (1323110411), we get a palindrome (2463223642).

The spelling of 1140113231 in words is "one billion, one hundred forty million, one hundred thirteen thousand, two hundred thirty-one".