42210555 has 16 divisors (see below), whose sum is σ = 67845120. Its totient is φ = 22409568.

The previous prime is 42210551. The next prime is 42210593. The reversal of 42210555 is 55501224.

It is a happy number.

It is not a de Polignac number, because 42210555 - 2² = 42210551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42210551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2965 + ... + 9654.

It is an arithmetic number, because the mean of its divisors is an integer number (4240320).

Almost surely, 2^42210555 is an apocalyptic number.

42210555 is a deficient number, since it is larger than the sum of its proper divisors (25634565).

42210555 is a wasteful number, since it uses less digits than its factorization.

42210555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12850.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 42210555 is about 6496.9650607033. The cubic root of 42210555 is about 348.1825653908.

Adding to 42210555 its reverse (55501224), we get a palindrome (97711779).

The spelling of 42210555 in words is "forty-two million, two hundred ten thousand, five hundred fifty-five".