1340144231 has 8 divisors (see below), whose sum is σ = 1363752960. Its totient is φ = 1316565432.

The previous prime is 1340144191. The next prime is 1340144237. The reversal of 1340144231 is 1324410431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340144231 is a prime.

It is a super-2 number, since 2×1340144231² = 3591973119765162722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340144197 and 1340144206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340144237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95066 + ... + 108248.

It is an arithmetic number, because the mean of its divisors is an integer number (170469120).

Almost surely, 2^1340144231 is an apocalyptic number.

1340144231 is a deficient number, since it is larger than the sum of its proper divisors (23608729).

1340144231 is a wasteful number, since it uses less digits than its factorization.

1340144231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14965.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1340144231 is about 36607.9804277701. The cubic root of 1340144231 is about 1102.5133249795.

Adding to 1340144231 its reverse (1324410431), we get a palindrome (2664554662).

The spelling of 1340144231 in words is "one billion, three hundred forty million, one hundred forty-four thousand, two hundred thirty-one".