1440231211 has 8 divisors (see below), whose sum is σ = 1530232560. Its totient is φ = 1355507104.

The previous prime is 1440231209. The next prime is 1440231229. The reversal of 1440231211 is 1121320441.

It is not a de Polignac number, because 1440231211 - 2¹ = 1440231209 is a prime.

It is a super-2 number, since 2×1440231211² = 4148531882277053042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1440231281) 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, 141661 + ... + 151486.

It is an arithmetic number, because the mean of its divisors is an integer number (191279070).

Almost surely, 2^1440231211 is an apocalyptic number.

1440231211 is a deficient number, since it is larger than the sum of its proper divisors (90001349).

1440231211 is an frugal number, since it uses more digits than its factorization.

1440231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293198 (or 293164 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1440231211 is about 37950.3782721596. The cubic root of 1440231211 is about 1129.3036697232.

Adding to 1440231211 its reverse (1121320441), we get a palindrome (2561551652).

The spelling of 1440231211 in words is "one billion, four hundred forty million, two hundred thirty-one thousand, two hundred eleven".