401442163 has 4 divisors (see below), whose sum is σ = 405580840. Its totient is φ = 397303488.

The previous prime is 401442137. The next prime is 401442187. The reversal of 401442163 is 361244104.

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 401442163 - 2¹⁷ = 401311091 is a prime.

It is a super-2 number, since 2×401442163² = 322311620468237138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401442113) 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, 2069193 + ... + 2069386.

It is an arithmetic number, because the mean of its divisors is an integer number (101395210).

Almost surely, 2^401442163 is an apocalyptic number.

401442163 is a deficient number, since it is larger than the sum of its proper divisors (4138677).

401442163 is an equidigital number, since it uses as much as digits as its factorization.

401442163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4138676.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 401442163 is about 20036.0216360434. The cubic root of 401442163 is about 737.6907333167.

Adding to 401442163 its reverse (361244104), we get a palindrome (762686267).

The spelling of 401442163 in words is "four hundred one million, four hundred forty-two thousand, one hundred sixty-three".