401343221 has 4 divisors (see below), whose sum is σ = 401395500. Its totient is φ = 401290944.

The previous prime is 401343203. The next prime is 401343233. The reversal of 401343221 is 122343104.

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 131102500 + 270240721 = 11450^2 + 16439^2 .

It is a cyclic number.

It is not a de Polignac number, because 401343221 - 2¹⁸ = 401081077 is a prime.

It is a super-2 number, since 2×401343221² = 322152762085309682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401343193 and 401343202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401343121) 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, 12116 + ... + 30813.

It is an arithmetic number, because the mean of its divisors is an integer number (100348875).

Almost surely, 2^401343221 is an apocalyptic number.

It is an amenable number.

401343221 is a deficient number, since it is larger than the sum of its proper divisors (52279).

401343221 is an equidigital number, since it uses as much as digits as its factorization.

401343221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52278.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 401343221 is about 20033.5523809433. The cubic root of 401343221 is about 737.6301230134.

Adding to 401343221 its reverse (122343104), we get a palindrome (523686325).

The spelling of 401343221 in words is "four hundred one million, three hundred forty-three thousand, two hundred twenty-one".