423236561 has 8 divisors (see below), whose sum is σ = 466285248. Its totient is φ = 380950000.

The previous prime is 423236557. The next prime is 423236587. The reversal of 423236561 is 165632324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 423236561 - 2² = 423236557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423236531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189365 + ... + 191586.

It is an arithmetic number, because the mean of its divisors is an integer number (58285656).

Almost surely, 2^423236561 is an apocalyptic number.

It is an amenable number.

423236561 is a deficient number, since it is larger than the sum of its proper divisors (43048687).

423236561 is a wasteful number, since it uses less digits than its factorization.

423236561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381063.

The product of its digits is 25920, while the sum is 32.

The square root of 423236561 is about 20572.7139920818. The cubic root of 423236561 is about 750.8059845047.

Adding to 423236561 its reverse (165632324), we get a palindrome (588868885).

It can be divided in two parts, 42323 and 6561, that added together give a palindrome (48884).

The spelling of 423236561 in words is "four hundred twenty-three million, two hundred thirty-six thousand, five hundred sixty-one".