423643251 has 4 divisors (see below), whose sum is σ = 564857672. Its totient is φ = 282428832.

The previous prime is 423643243. The next prime is 423643271. The reversal of 423643251 is 152346324.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 423643251 - 2³ = 423643243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423643271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70607206 + ... + 70607211.

It is an arithmetic number, because the mean of its divisors is an integer number (141214418).

Almost surely, 2^423643251 is an apocalyptic number.

423643251 is a deficient number, since it is larger than the sum of its proper divisors (141214421).

423643251 is a wasteful number, since it uses less digits than its factorization.

423643251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141214420.

The product of its digits is 17280, while the sum is 30.

The square root of 423643251 is about 20582.5958275432. The cubic root of 423643251 is about 751.0463918510.

Adding to 423643251 its reverse (152346324), we get a palindrome (575989575).

The spelling of 423643251 in words is "four hundred twenty-three million, six hundred forty-three thousand, two hundred fifty-one".