400042422243 has 32 divisors (see below), whose sum is σ = 604308859200. Its totient is φ = 261458765568.

The previous prime is 400042422217. The next prime is 400042422313. The reversal of 400042422243 is 342224240004.

It is not a de Polignac number, because 400042422243 - 2¹⁸ = 400042160099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (400042422203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1736121 + ... + 1952997.

It is an arithmetic number, because the mean of its divisors is an integer number (18884651850).

Almost surely, 2^400042422243 is an apocalyptic number.

400042422243 is a deficient number, since it is larger than the sum of its proper divisors (204266436957).

400042422243 is a wasteful number, since it uses less digits than its factorization.

400042422243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218228 (or 218222 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 400042422243 its reverse (342224240004), we get a palindrome (742266662247).

The spelling of 400042422243 in words is "four hundred billion, forty-two million, four hundred twenty-two thousand, two hundred forty-three".