402144443231 has 2 divisors, whose sum is σ = 402144443232. Its totient is φ = 402144443230.

The previous prime is 402144443227. The next prime is 402144443273. The reversal of 402144443231 is 132344441204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402144443231 - 2² = 402144443227 is a prime.

It is a super-2 number, since 2×402144443231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402144443531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201072221615 + 201072221616.

It is an arithmetic number, because the mean of its divisors is an integer number (201072221616).

Almost surely, 2^402144443231 is an apocalyptic number.

402144443231 is a deficient number, since it is larger than the sum of its proper divisors (1).

402144443231 is an equidigital number, since it uses as much as digits as its factorization.

402144443231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 402144443231 its reverse (132344441204), we get a palindrome (534488884435).

The spelling of 402144443231 in words is "four hundred two billion, one hundred forty-four million, four hundred forty-three thousand, two hundred thirty-one".