42243499 has 2 divisors, whose sum is σ = 42243500. Its totient is φ = 42243498.

The previous prime is 42243497. The next prime is 42243503. The reversal of 42243499 is 99434224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42243499 - 2¹ = 42243497 is a prime.

Together with 42243497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42243497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121749 + 21121750.

It is an arithmetic number, because the mean of its divisors is an integer number (21121750).

Almost surely, 2^42243499 is an apocalyptic number.

42243499 is a deficient number, since it is larger than the sum of its proper divisors (1).

42243499 is an equidigital number, since it uses as much as digits as its factorization.

42243499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 37.

The square root of 42243499 is about 6499.4999038388. The cubic root of 42243499 is about 348.2731236536.

The spelling of 42243499 in words is "forty-two million, two hundred forty-three thousand, four hundred ninety-nine".