42251223 has 16 divisors (see below), whose sum is σ = 65440256. Its totient is φ = 23747040.

The previous prime is 42251203. The next prime is 42251227. The reversal of 42251223 is 32215224.

It is not a de Polignac number, because 42251223 - 2⁵ = 42251191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 42251223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42251227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15211 + ... + 17772.

It is an arithmetic number, because the mean of its divisors is an integer number (4090016).

Almost surely, 2^42251223 is an apocalyptic number.

42251223 is a deficient number, since it is larger than the sum of its proper divisors (23189033).

42251223 is a wasteful number, since it uses less digits than its factorization.

42251223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33054.

The product of its digits is 960, while the sum is 21.

The square root of 42251223 is about 6500.0940762423. The cubic root of 42251223 is about 348.2943489919.

Adding to 42251223 its reverse (32215224), we get a palindrome (74466447).

The spelling of 42251223 in words is "forty-two million, two hundred fifty-one thousand, two hundred twenty-three".