42131223 has 24 divisors (see below), whose sum is σ = 62819328. Its totient is φ = 27194832.

The previous prime is 42131183. The next prime is 42131267. The reversal of 42131223 is 32213124.

It is not a de Polignac number, because 42131223 - 2²⁵ = 8576791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42131196 and 42131205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42131273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43086 + ... + 44052.

It is an arithmetic number, because the mean of its divisors is an integer number (2617472).

Almost surely, 2^42131223 is an apocalyptic number.

42131223 is a deficient number, since it is larger than the sum of its proper divisors (20688105).

42131223 is a wasteful number, since it uses less digits than its factorization.

42131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123 (or 1120 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 42131223 is about 6490.8568771773. The cubic root of 42131223 is about 347.9642997464.

Adding to 42131223 its reverse (32213124), we get a palindrome (74344347).

The spelling of 42131223 in words is "forty-two million, one hundred thirty-one thousand, two hundred twenty-three".