42211723 has 4 divisors (see below), whose sum is σ = 42229440. Its totient is φ = 42194008.

The previous prime is 42211717. The next prime is 42211747. The reversal of 42211723 is 32711224.

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

It is a cyclic number.

It is not a de Polignac number, because 42211723 - 2¹³ = 42203531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42211694 and 42211703.

It is not an unprimeable number, because it can be changed into a prime (42211523) 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, 4603 + ... + 10276.

It is an arithmetic number, because the mean of its divisors is an integer number (10557360).

Almost surely, 2^42211723 is an apocalyptic number.

42211723 is a deficient number, since it is larger than the sum of its proper divisors (17717).

42211723 is a wasteful number, since it uses less digits than its factorization.

42211723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17716.

The product of its digits is 672, while the sum is 22.

The square root of 42211723 is about 6497.0549482054. The cubic root of 42211723 is about 348.1857768584.

Adding to 42211723 its reverse (32711224), we get a palindrome (74922947).

The spelling of 42211723 in words is "forty-two million, two hundred eleven thousand, seven hundred twenty-three".