42230191 has 2 divisors, whose sum is σ = 42230192. Its totient is φ = 42230190.

The previous prime is 42230147. The next prime is 42230207. The reversal of 42230191 is 19103224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42230191 - 2⁷ = 42230063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42230101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21115095 + 21115096.

It is an arithmetic number, because the mean of its divisors is an integer number (21115096).

Almost surely, 2^42230191 is an apocalyptic number.

42230191 is a deficient number, since it is larger than the sum of its proper divisors (1).

42230191 is an equidigital number, since it uses as much as digits as its factorization.

42230191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 42230191 is about 6498.4760521218. The cubic root of 42230191 is about 348.2365475679.

The spelling of 42230191 in words is "forty-two million, two hundred thirty thousand, one hundred ninety-one".