40042522 has 20 divisors (see below), whose sum is σ = 65161746. Its totient is φ = 18454800.

The previous prime is 40042469. The next prime is 40042553. The reversal of 40042522 is 22524004.

It can be written as a sum of positive squares in 5 ways, for example, as 1366561 + 38675961 = 1169^2 + 6219^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40042522.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 56772 + ... + 57472.

Almost surely, 2^40042522 is an apocalyptic number.

40042522 is a deficient number, since it is larger than the sum of its proper divisors (25119224).

40042522 is an frugal number, since it uses more digits than its factorization.

40042522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 40042522 is about 6327.9160866750. The cubic root of 40042522 is about 342.1163324138.

Adding to 40042522 its reverse (22524004), we get a palindrome (62566526).

The spelling of 40042522 in words is "forty million, forty-two thousand, five hundred twenty-two".