42220522 has 4 divisors (see below), whose sum is σ = 63330786. Its totient is φ = 21110260.

The previous prime is 42220517. The next prime is 42220559. The reversal of 42220522 is 22502224.

42220522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28611801 + 13608721 = 5349^2 + 3689^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42220522.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555129 + ... + 10555132.

Almost surely, 2^42220522 is an apocalyptic number.

42220522 is a deficient number, since it is larger than the sum of its proper divisors (21110264).

42220522 is a wasteful number, since it uses less digits than its factorization.

42220522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21110263.

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

The square root of 42220522 is about 6497.7320658827. The cubic root of 42220522 is about 348.2099681934.

Adding to 42220522 its reverse (22502224), we get a palindrome (64722746).

The spelling of 42220522 in words is "forty-two million, two hundred twenty thousand, five hundred twenty-two".