401220443 has 4 divisors (see below), whose sum is σ = 432083568. Its totient is φ = 370357320.

The previous prime is 401220437. The next prime is 401220467. The reversal of 401220443 is 344022104.

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 401220443 - 2⁴ = 401220427 is a prime.

It is a super-2 number, since 2×401220443² = 321955687762232498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401220403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15431543 + ... + 15431568.

It is an arithmetic number, because the mean of its divisors is an integer number (108020892).

Almost surely, 2^401220443 is an apocalyptic number.

401220443 is a deficient number, since it is larger than the sum of its proper divisors (30863125).

401220443 is a wasteful number, since it uses less digits than its factorization.

401220443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30863124.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 401220443 is about 20030.4878372944. The cubic root of 401220443 is about 737.5548973020.

Adding to 401220443 its reverse (344022104), we get a palindrome (745242547).

The spelling of 401220443 in words is "four hundred one million, two hundred twenty thousand, four hundred forty-three".