402441440143 has 4 divisors (see below), whose sum is σ = 402749353800. Its totient is φ = 402133526488.

The previous prime is 402441440069. The next prime is 402441440231. The reversal of 402441440143 is 341044144204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402441440143 is a prime.

It is a super-2 number, since 2×402441440143² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402441440243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153954868 + ... + 153957481.

It is an arithmetic number, because the mean of its divisors is an integer number (100687338450).

Almost surely, 2^402441440143 is an apocalyptic number.

402441440143 is a deficient number, since it is larger than the sum of its proper divisors (307913657).

402441440143 is a wasteful number, since it uses less digits than its factorization.

402441440143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307913656.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 402441440143 its reverse (341044144204), we get a palindrome (743485584347).

The spelling of 402441440143 in words is "four hundred two billion, four hundred forty-one million, four hundred forty thousand, one hundred forty-three".