423443542 has 4 divisors (see below), whose sum is σ = 635165316. Its totient is φ = 211721770.

The previous prime is 423443513. The next prime is 423443549. The reversal of 423443542 is 245344324.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423443549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105860884 + ... + 105860887.

It is an arithmetic number, because the mean of its divisors is an integer number (158791329).

Almost surely, 2^423443542 is an apocalyptic number.

423443542 is a deficient number, since it is larger than the sum of its proper divisors (211721774).

423443542 is a wasteful number, since it uses less digits than its factorization.

423443542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211721773.

The product of its digits is 46080, while the sum is 31.

The square root of 423443542 is about 20577.7438510639. The cubic root of 423443542 is about 750.9283567679.

Adding to 423443542 its reverse (245344324), we get a palindrome (668787866).

The spelling of 423443542 in words is "four hundred twenty-three million, four hundred forty-three thousand, five hundred forty-two".