42550231 has 2 divisors, whose sum is σ = 42550232. Its totient is φ = 42550230.

The previous prime is 42550187. The next prime is 42550243. The reversal of 42550231 is 13205524.

42550231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42550231 - 2¹⁷ = 42419159 is a prime.

It is a super-2 number, since 2×42550231² = 3621044316306722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42550271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21275115 + 21275116.

It is an arithmetic number, because the mean of its divisors is an integer number (21275116).

Almost surely, 2^42550231 is an apocalyptic number.

42550231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42550231 is an equidigital number, since it uses as much as digits as its factorization.

42550231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 42550231 is about 6523.0538093749. The cubic root of 42550231 is about 349.1140340489.

Adding to 42550231 its reverse (13205524), we get a palindrome (55755755).

The spelling of 42550231 in words is "forty-two million, five hundred fifty thousand, two hundred thirty-one".