213423563 has 4 divisors (see below), whose sum is σ = 213681840. Its totient is φ = 213165288.

The previous prime is 213423541. The next prime is 213423583. The reversal of 213423563 is 365324312.

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 213423563 - 2⁸ = 213423307 is a prime.

It is a super-2 number, since 2×213423563² = 91099234487229938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213423533) 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, 127895 + ... + 129552.

It is an arithmetic number, because the mean of its divisors is an integer number (53420460).

Almost surely, 2^213423563 is an apocalyptic number.

213423563 is a deficient number, since it is larger than the sum of its proper divisors (258277).

213423563 is an equidigital number, since it uses as much as digits as its factorization.

213423563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258276.

The product of its digits is 12960, while the sum is 29.

The square root of 213423563 is about 14609.0233417570. The cubic root of 213423563 is about 597.6048617623.

Adding to 213423563 its reverse (365324312), we get a palindrome (578747875).

The spelling of 213423563 in words is "two hundred thirteen million, four hundred twenty-three thousand, five hundred sixty-three".