42031522 has 8 divisors (see below), whose sum is σ = 67897116. Its totient is φ = 19399152.

The previous prime is 42031471. The next prime is 42031523. The reversal of 42031522 is 22513024.

It can be written as a sum of positive squares in 2 ways, for example, as 40819321 + 1212201 = 6389^2 + 1101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42031522.

It is not an unprimeable number, because it can be changed into a prime (42031523) 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, 808273 + ... + 808324.

Almost surely, 2^42031522 is an apocalyptic number.

42031522 is a deficient number, since it is larger than the sum of its proper divisors (25865594).

42031522 is a wasteful number, since it uses less digits than its factorization.

42031522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616612.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42031522 is about 6483.1722173640. The cubic root of 42031522 is about 347.6896041008.

Adding to 42031522 its reverse (22513024), we get a palindrome (64544546).

The spelling of 42031522 in words is "forty-two million, thirty-one thousand, five hundred twenty-two".