400421144232143 has 4 divisors (see below), whose sum is σ = 400570165873920. Its totient is φ = 400272122590368.

The previous prime is 400421144232097. The next prime is 400421144232223. The reversal of 400421144232143 is 341232441124004.

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

It is a cyclic number.

It is not a de Polignac number, because 400421144232143 - 2²² = 400421140037839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400421144282143) 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, 74510816858 + ... + 74510822231.

It is an arithmetic number, because the mean of its divisors is an integer number (100142541468480).

Almost surely, 2^{400421144232143} is an apocalyptic number.

400421144232143 is a deficient number, since it is larger than the sum of its proper divisors (149021641777).

400421144232143 is a wasteful number, since it uses less digits than its factorization.

400421144232143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149021641776.

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 400421144232143 its reverse (341232441124004), we get a palindrome (741653585356147).

The spelling of 400421144232143 in words is "four hundred trillion, four hundred twenty-one billion, one hundred forty-four million, two hundred thirty-two thousand, one hundred forty-three".