42210505 has 8 divisors (see below), whose sum is σ = 50792832. Its totient is φ = 33674928.

The previous prime is 42210431. The next prime is 42210521. The reversal of 42210505 is 50501224.

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

It is a cyclic number.

It is not a de Polignac number, because 42210505 - 2¹¹ = 42208457 is a prime.

It is a super-3 number, since 3×42210505³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9667 + ... + 13336.

It is an arithmetic number, because the mean of its divisors is an integer number (6349104).

Almost surely, 2^42210505 is an apocalyptic number.

It is an amenable number.

42210505 is a deficient number, since it is larger than the sum of its proper divisors (8582327).

42210505 is a wasteful number, since it uses less digits than its factorization.

42210505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23375.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 42210505 is about 6496.9612127517. The cubic root of 42210505 is about 348.1824279123.

Adding to 42210505 its reverse (50501224), we get a palindrome (92711729).

The spelling of 42210505 in words is "forty-two million, two hundred ten thousand, five hundred five".