401326563 has 32 divisors (see below), whose sum is σ = 630167040. Its totient is φ = 224618240.

The previous prime is 401326559. The next prime is 401326579. The reversal of 401326563 is 365623104.

It is not a de Polignac number, because 401326563 - 2² = 401326559 is a prime.

It is a super-2 number, since 2×401326563² = 322126020338785938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401326563.

It is not an unprimeable number, because it can be changed into a prime (401326063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12895 + ... + 31127.

It is an arithmetic number, because the mean of its divisors is an integer number (19692720).

Almost surely, 2^401326563 is an apocalyptic number.

401326563 is a deficient number, since it is larger than the sum of its proper divisors (228840477).

401326563 is a wasteful number, since it uses less digits than its factorization.

401326563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18299.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 401326563 is about 20033.1366241036. The cubic root of 401326563 is about 737.6199176065.

Adding to 401326563 its reverse (365623104), we get a palindrome (766949667).

The spelling of 401326563 in words is "four hundred one million, three hundred twenty-six thousand, five hundred sixty-three".