423556213 has 4 divisors (see below), whose sum is σ = 426603520. Its totient is φ = 420508908.

The previous prime is 423556163. The next prime is 423556261. The reversal of 423556213 is 312655324.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423556213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423556313) 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, 1523445 + ... + 1523722.

It is an arithmetic number, because the mean of its divisors is an integer number (106650880).

Almost surely, 2^423556213 is an apocalyptic number.

It is an amenable number.

423556213 is a deficient number, since it is larger than the sum of its proper divisors (3047307).

423556213 is a wasteful number, since it uses less digits than its factorization.

423556213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047306.

The product of its digits is 21600, while the sum is 31.

The square root of 423556213 is about 20580.4813597739. The cubic root of 423556213 is about 750.9949538758.

The spelling of 423556213 in words is "four hundred twenty-three million, five hundred fifty-six thousand, two hundred thirteen".