423221143 has 4 divisors (see below), whose sum is σ = 445495960. Its totient is φ = 400946328.

The previous prime is 423221107. The next prime is 423221153. The reversal of 423221143 is 341122324.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423221143 is a prime.

It is a super-2 number, since 2×423221143² = 358232271764452898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423221153) 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, 11137380 + ... + 11137417.

It is an arithmetic number, because the mean of its divisors is an integer number (111373990).

Almost surely, 2^423221143 is an apocalyptic number.

423221143 is a deficient number, since it is larger than the sum of its proper divisors (22274817).

423221143 is a wasteful number, since it uses less digits than its factorization.

423221143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22274816.

The product of its digits is 1152, while the sum is 22.

The square root of 423221143 is about 20572.3392690282. The cubic root of 423221143 is about 750.7968674070.

Adding to 423221143 its reverse (341122324), we get a palindrome (764343467).

The spelling of 423221143 in words is "four hundred twenty-three million, two hundred twenty-one thousand, one hundred forty-three".