402144441231 has 16 divisors (see below), whose sum is σ = 583155387360. Its totient is φ = 245023267200.

The previous prime is 402144441221. The next prime is 402144441247. The reversal of 402144441231 is 132144441204.

It is a happy number.

It is not a de Polignac number, because 402144441231 - 2²⁹ = 401607570319 is a prime.

It is a super-2 number, since 2×402144441231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402144441221) 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, 51042576 + ... + 51050453.

It is an arithmetic number, because the mean of its divisors is an integer number (36447211710).

Almost surely, 2^402144441231 is an apocalyptic number.

402144441231 is a deficient number, since it is larger than the sum of its proper divisors (181010946129).

402144441231 is a wasteful number, since it uses less digits than its factorization.

402144441231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102093146.

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 402144441231 its reverse (132144441204), we get a palindrome (534288882435).

It can be divided in two parts, 4021444 and 41231, that added together give a triangular number (4062675 = T₂₈₅₀).

The spelling of 402144441231 in words is "four hundred two billion, one hundred forty-four million, four hundred forty-one thousand, two hundred thirty-one".