400042212293 has 2 divisors, whose sum is σ = 400042212294. Its totient is φ = 400042212292.

The previous prime is 400042212287. The next prime is 400042212313. The reversal of 400042212293 is 392212240004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399180085249 + 862127044 = 631807^2 + 29362^2 .

It is a cyclic number.

It is not a de Polignac number, because 400042212293 - 2²⁸ = 399773776837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400042212793) 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 as a sum of consecutive naturals, namely, 200021106146 + 200021106147.

It is an arithmetic number, because the mean of its divisors is an integer number (200021106147).

Almost surely, 2^400042212293 is an apocalyptic number.

It is an amenable number.

400042212293 is a deficient number, since it is larger than the sum of its proper divisors (1).

400042212293 is an equidigital number, since it uses as much as digits as its factorization.

400042212293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 400042212293 its reverse (392212240004), we get a palindrome (792254452297).

The spelling of 400042212293 in words is "four hundred billion, forty-two million, two hundred twelve thousand, two hundred ninety-three".