42442555 has 4 divisors (see below), whose sum is σ = 50931072. Its totient is φ = 33954040.

The previous prime is 42442541. The next prime is 42442571. The reversal of 42442555 is 55524424.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42442555 - 2⁷ = 42442427 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4244251 + ... + 4244260.

It is an arithmetic number, because the mean of its divisors is an integer number (12732768).

Almost surely, 2^42442555 is an apocalyptic number.

42442555 is a deficient number, since it is larger than the sum of its proper divisors (8488517).

42442555 is an equidigital number, since it uses as much as digits as its factorization.

42442555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8488516.

The product of its digits is 32000, while the sum is 31.

The square root of 42442555 is about 6514.7950850353. The cubic root of 42442555 is about 348.8193003858.

Adding to 42442555 its reverse (55524424), we get a palindrome (97966979).

The spelling of 42442555 in words is "forty-two million, four hundred forty-two thousand, five hundred fifty-five".