401344344421 has 4 divisors (see below), whose sum is σ = 401636657772. Its totient is φ = 401052031072.

The previous prime is 401344344397. The next prime is 401344344451. The reversal of 401344344421 is 124443443104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 196882113796 + 204462230625 = 443714^2 + 452175^2 .

It is a cyclic number.

It is not a de Polignac number, because 401344344421 - 2²⁷ = 401210126693 is a prime.

It is a super-2 number, since 2×401344344421² (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 (401344344451) 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, 146154616 + ... + 146157361.

It is an arithmetic number, because the mean of its divisors is an integer number (100409164443).

Almost surely, 2^401344344421 is an apocalyptic number.

It is an amenable number.

401344344421 is a deficient number, since it is larger than the sum of its proper divisors (292313351).

401344344421 is a wasteful number, since it uses less digits than its factorization.

401344344421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292313350.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 401344344421 its reverse (124443443104), we get a palindrome (525787787525).

The spelling of 401344344421 in words is "four hundred one billion, three hundred forty-four million, three hundred forty-four thousand, four hundred twenty-one".