42210331 has 2 divisors, whose sum is σ = 42210332. Its totient is φ = 42210330.

The previous prime is 42210319. The next prime is 42210373. The reversal of 42210331 is 13301224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42210331 - 2¹⁵ = 42177563 is a prime.

It is a super-2 number, since 2×42210331² = 3563424086259122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42210431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21105165 + 21105166.

It is an arithmetic number, because the mean of its divisors is an integer number (21105166).

Almost surely, 2^42210331 is an apocalyptic number.

42210331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42210331 is an equidigital number, since it uses as much as digits as its factorization.

42210331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 42210331 is about 6496.9478218622. The cubic root of 42210331 is about 348.1819494862.

Adding to 42210331 its reverse (13301224), we get a palindrome (55511555).

The spelling of 42210331 in words is "forty-two million, two hundred ten thousand, three hundred thirty-one".