1440412231 has 2 divisors, whose sum is σ = 1440412232. Its totient is φ = 1440412230.

The previous prime is 1440412229. The next prime is 1440412247. The reversal of 1440412231 is 1322140441.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1440412231 - 2¹ = 1440412229 is a prime.

It is a super-2 number, since 2×1440412231² = 4149574790428794722, which contains 22 as substring.

Together with 1440412229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440412031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720206115 + 720206116.

It is an arithmetic number, because the mean of its divisors is an integer number (720206116).

Almost surely, 2^1440412231 is an apocalyptic number.

1440412231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440412231 is an equidigital number, since it uses as much as digits as its factorization.

1440412231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1440412231 is about 37952.7631536888. The cubic root of 1440412231 is about 1129.3509811050.

Adding to 1440412231 its reverse (1322140441), we get a palindrome (2762552672).

The spelling of 1440412231 in words is "one billion, four hundred forty million, four hundred twelve thousand, two hundred thirty-one".