42221210 has 16 divisors (see below), whose sum is σ = 76072392. Its totient is φ = 16872000.

The previous prime is 42221209. The next prime is 42221219. The reversal of 42221210 is 1212224.

It can be written as a sum of positive squares in 4 ways, for example, as 28015849 + 14205361 = 5293^2 + 3769^2 .

It is not an unprimeable number, because it can be changed into a prime (42221219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17900 + ... + 20120.

Almost surely, 2^42221210 is an apocalyptic number.

42221210 is a deficient number, since it is larger than the sum of its proper divisors (33851182).

42221210 is a wasteful number, since it uses less digits than its factorization.

42221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 42221210 is about 6497.7850072159. The cubic root of 42221210 is about 348.2118595892.

Adding to 42221210 its reverse (1212224), we get a palindrome (43433434).

The spelling of 42221210 in words is "forty-two million, two hundred twenty-one thousand, two hundred ten".