42223451 has 4 divisors (see below), whose sum is σ = 42315504. Its totient is φ = 42131400.

The previous prime is 42223429. The next prime is 42223513. The reversal of 42223451 is 15432224.

It is a happy number.

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-42223451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42223751) 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, 45335 + ... + 46256.

It is an arithmetic number, because the mean of its divisors is an integer number (10578876).

Almost surely, 2^42223451 is an apocalyptic number.

42223451 is a deficient number, since it is larger than the sum of its proper divisors (92053).

42223451 is an equidigital number, since it uses as much as digits as its factorization.

42223451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92052.

The product of its digits is 1920, while the sum is 23.

The square root of 42223451 is about 6497.9574483064. The cubic root of 42223451 is about 348.2180202288.

Adding to 42223451 its reverse (15432224), we get a palindrome (57655675).

The spelling of 42223451 in words is "forty-two million, two hundred twenty-three thousand, four hundred fifty-one".