1320144231 has 40 divisors (see below), whose sum is σ = 2174427504. Its totient is φ = 709927680.

The previous prime is 1320144229. The next prime is 1320144311. The reversal of 1320144231 is 1324410231.

It is not a de Polignac number, because 1320144231 - 2¹ = 1320144229 is a prime.

It is a super-2 number, since 2×1320144231² = 3485561581285162722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1320144198 and 1320144207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320144211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 117061 + ... + 127841.

Almost surely, 2^1320144231 is an apocalyptic number.

1320144231 is a deficient number, since it is larger than the sum of its proper divisors (854283273).

1320144231 is an equidigital number, since it uses as much as digits as its factorization.

1320144231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10829 (or 10808 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1320144231 is about 36333.7891087621. The cubic root of 1320144231 is about 1097.0012625230.

Adding to 1320144231 its reverse (1324410231), we get a palindrome (2644554462).

The spelling of 1320144231 in words is "one billion, three hundred twenty million, one hundred forty-four thousand, two hundred thirty-one".