42211242565 has 4 divisors (see below), whose sum is σ = 50653491084. Its totient is φ = 33768994048.

The previous prime is 42211242533. The next prime is 42211242571. The reversal of 42211242565 is 56524211224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13131784836 + 29079457729 = 114594^2 + 170527^2 .

It is a cyclic number.

It is not a de Polignac number, because 42211242565 - 2⁵ = 42211242533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42211242565.

It is a congruent 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, 4221124252 + ... + 4221124261.

It is an arithmetic number, because the mean of its divisors is an integer number (12663372771).

Almost surely, 2^42211242565 is an apocalyptic number.

It is an amenable number.

42211242565 is a deficient number, since it is larger than the sum of its proper divisors (8442248519).

42211242565 is an equidigital number, since it uses as much as digits as its factorization.

42211242565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8442248518.

The product of its digits is 38400, while the sum is 34.

Adding to 42211242565 its reverse (56524211224), we get a palindrome (98735453789).

The spelling of 42211242565 in words is "forty-two billion, two hundred eleven million, two hundred forty-two thousand, five hundred sixty-five".