402441340243 has 4 divisors (see below), whose sum is σ = 402443167320. Its totient is φ = 402439513168.

The previous prime is 402441340207. The next prime is 402441340253. The reversal of 402441340243 is 342043144204.

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-402441340243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402441340253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529258 + ... + 1041631.

It is an arithmetic number, because the mean of its divisors is an integer number (100610791830).

Almost surely, 2^402441340243 is an apocalyptic number.

402441340243 is a deficient number, since it is larger than the sum of its proper divisors (1827077).

402441340243 is a wasteful number, since it uses less digits than its factorization.

402441340243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827076.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 402441340243 its reverse (342043144204), we get a palindrome (744484484447).

The spelling of 402441340243 in words is "four hundred two billion, four hundred forty-one million, three hundred forty thousand, two hundred forty-three".