401622563 has 4 divisors (see below), whose sum is σ = 403042008. Its totient is φ = 400203120.

The previous prime is 401622523. The next prime is 401622587. The reversal of 401622563 is 365226104.

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 401622563 - 2¹⁶ = 401557027 is a prime.

It is a super-2 number, since 2×401622563² = 322601366221377938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401622523) 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, 709298 + ... + 709863.

It is an arithmetic number, because the mean of its divisors is an integer number (100760502).

Almost surely, 2^401622563 is an apocalyptic number.

401622563 is a deficient number, since it is larger than the sum of its proper divisors (1419445).

401622563 is a wasteful number, since it uses less digits than its factorization.

401622563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419444.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 401622563 is about 20040.5230221170. The cubic root of 401622563 is about 737.8012178739.

Adding to 401622563 its reverse (365226104), we get a palindrome (766848667).

The spelling of 401622563 in words is "four hundred one million, six hundred twenty-two thousand, five hundred sixty-three".