42224808781 has 4 divisors (see below), whose sum is σ = 43680836700. Its totient is φ = 40768780864.

The previous prime is 42224808761. The next prime is 42224808793. The reversal of 42224808781 is 18780842224.

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 14618986281 + 27605822500 = 120909^2 + 166150^2 .

It is a cyclic number.

It is not a de Polignac number, because 42224808781 - 2⁵ = 42224808749 is a prime.

It is a super-2 number, since 2×42224808781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42224808721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728013916 + ... + 728013973.

It is an arithmetic number, because the mean of its divisors is an integer number (10920209175).

Almost surely, 2^42224808781 is an apocalyptic number.

It is an amenable number.

42224808781 is a deficient number, since it is larger than the sum of its proper divisors (1456027919).

42224808781 is a wasteful number, since it uses less digits than its factorization.

42224808781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456027918.

The product of its (nonzero) digits is 458752, while the sum is 46.

The spelling of 42224808781 in words is "forty-two billion, two hundred twenty-four million, eight hundred eight thousand, seven hundred eighty-one".