42090029522 has 6 divisors (see below), whose sum is σ = 63135479493. Its totient is φ = 21044869692.

The previous prime is 42090029519. The next prime is 42090029539. The reversal of 42090029522 is 22592009024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42009011521 + 81018001 = 204961^2 + 9001^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=145069.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 217604 + ... + 362672.

Almost surely, 2^42090029522 is an apocalyptic number.

42090029522 is a deficient number, since it is larger than the sum of its proper divisors (21045449971).

42090029522 is an frugal number, since it uses more digits than its factorization.

42090029522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290140 (or 145071 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 42090029522 in words is "forty-two billion, ninety million, twenty-nine thousand, five hundred twenty-two".