1440043231 has 16 divisors (see below), whose sum is σ = 1684851840. Its totient is φ = 1216818720.

The previous prime is 1440043207. The next prime is 1440043237. The reversal of 1440043231 is 1323400441.

It is a cyclic number.

It is not a de Polignac number, because 1440043231 - 2¹³ = 1440035039 is a prime.

It is a super-2 number, since 2×1440043231² = 4147449014297838722, 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 (1440043237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53925 + ... + 76078.

It is an arithmetic number, because the mean of its divisors is an integer number (105303240).

Almost surely, 2^1440043231 is an apocalyptic number.

1440043231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1440043231 is a deficient number, since it is larger than the sum of its proper divisors (244808609).

1440043231 is a wasteful number, since it uses less digits than its factorization.

1440043231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130086.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1440043231 is about 37947.9015361851. The cubic root of 1440043231 is about 1129.2545350799.

Adding to 1440043231 its reverse (1323400441), we get a palindrome (2763443672).

The spelling of 1440043231 in words is "one billion, four hundred forty million, forty-three thousand, two hundred thirty-one".