42216773 has 4 divisors (see below), whose sum is σ = 42232620. Its totient is φ = 42200928.

The previous prime is 42216751. The next prime is 42216781. The reversal of 42216773 is 37761224.

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 38464804 + 3751969 = 6202^2 + 1937^2 .

It is a cyclic number.

It is not a de Polignac number, because 42216773 - 2⁶ = 42216709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42216173) 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, 2840 + ... + 9617.

It is an arithmetic number, because the mean of its divisors is an integer number (10558155).

Almost surely, 2^42216773 is an apocalyptic number.

It is an amenable number.

42216773 is a deficient number, since it is larger than the sum of its proper divisors (15847).

42216773 is a wasteful number, since it uses less digits than its factorization.

42216773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15846.

The product of its digits is 14112, while the sum is 32.

The square root of 42216773 is about 6497.4435742067. The cubic root of 42216773 is about 348.1996613746.

Adding to 42216773 its reverse (37761224), we get a palindrome (79977997).

The spelling of 42216773 in words is "forty-two million, two hundred sixteen thousand, seven hundred seventy-three".