42511223 has 4 divisors (see below), whose sum is σ = 42553488. Its totient is φ = 42468960.

The previous prime is 42511177. The next prime is 42511229. The reversal of 42511223 is 32211524.

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 42511223 - 2⁸ = 42510967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42511195 and 42511204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42511229) 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, 19586 + ... + 21647.

It is an arithmetic number, because the mean of its divisors is an integer number (10638372).

Almost surely, 2^42511223 is an apocalyptic number.

42511223 is a deficient number, since it is larger than the sum of its proper divisors (42265).

42511223 is a wasteful number, since it uses less digits than its factorization.

42511223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42264.

The product of its digits is 480, while the sum is 20.

The square root of 42511223 is about 6520.0631131915. The cubic root of 42511223 is about 349.0073177941.

Adding to 42511223 its reverse (32211524), we get a palindrome (74722747).

The spelling of 42511223 in words is "forty-two million, five hundred eleven thousand, two hundred twenty-three".