42031422 has 12 divisors (see below), whose sum is σ = 91068120. Its totient is φ = 14010468.

The previous prime is 42031417. The next prime is 42031441. The reversal of 42031422 is 22413024.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2335079 = 42031422 / (4 + 2 + 0 + 3 + 1 + 4 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 42031395 and 42031404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1167522 + ... + 1167557.

It is an arithmetic number, because the mean of its divisors is an integer number (7589010).

Almost surely, 2^42031422 is an apocalyptic number.

42031422 is an abundant number, since it is smaller than the sum of its proper divisors (49036698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42031422 is a wasteful number, since it uses less digits than its factorization.

42031422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335087 (or 2335084 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42031422 is about 6483.1645050855. The cubic root of 42031422 is about 347.6893283634.

Adding to 42031422 its reverse (22413024), we get a palindrome (64444446).

It can be divided in two parts, 4203 and 1422, that added together give a square (5625 = 75²).

The spelling of 42031422 in words is "forty-two million, thirty-one thousand, four hundred twenty-two".