42228311 has 2 divisors, whose sum is σ = 42228312. Its totient is φ = 42228310.

The previous prime is 42228301. The next prime is 42228337. The reversal of 42228311 is 11382224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42228311 - 2¹⁴ = 42211927 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42228301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21114155 + 21114156.

It is an arithmetic number, because the mean of its divisors is an integer number (21114156).

Almost surely, 2^42228311 is an apocalyptic number.

42228311 is a deficient number, since it is larger than the sum of its proper divisors (1).

42228311 is an equidigital number, since it uses as much as digits as its factorization.

42228311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

The square root of 42228311 is about 6498.3314012137. The cubic root of 42228311 is about 348.2313799031.

The spelling of 42228311 in words is "forty-two million, two hundred twenty-eight thousand, three hundred eleven".