42520223 has 4 divisors (see below), whose sum is σ = 42617520. Its totient is φ = 42422928.

The previous prime is 42520217. The next prime is 42520259. The reversal of 42520223 is 32202524.

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 42520223 - 2¹⁰ = 42519199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42520195 and 42520204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42520273) 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, 47990 + ... + 48867.

It is an arithmetic number, because the mean of its divisors is an integer number (10654380).

Almost surely, 2^42520223 is an apocalyptic number.

42520223 is a deficient number, since it is larger than the sum of its proper divisors (97297).

42520223 is an equidigital number, since it uses as much as digits as its factorization.

42520223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97296.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 42520223 is about 6520.7532540344. The cubic root of 42520223 is about 349.0319453631.

Adding to 42520223 its reverse (32202524), we get a palindrome (74722747).

The spelling of 42520223 in words is "forty-two million, five hundred twenty thousand, two hundred twenty-three".