42522231 has 4 divisors (see below), whose sum is σ = 56696312. Its totient is φ = 28348152.

The previous prime is 42522229. The next prime is 42522283. The reversal of 42522231 is 13222524.

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

It is not a de Polignac number, because 42522231 - 2¹ = 42522229 is a prime.

It is a super-2 number, since 2×42522231² = 3616280258434722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42522198 and 42522207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42522031) 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, 7087036 + ... + 7087041.

It is an arithmetic number, because the mean of its divisors is an integer number (14174078).

Almost surely, 2^42522231 is an apocalyptic number.

42522231 is a deficient number, since it is larger than the sum of its proper divisors (14174081).

42522231 is a wasteful number, since it uses less digits than its factorization.

42522231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14174080.

The product of its digits is 960, while the sum is 21.

The square root of 42522231 is about 6520.9072221586. The cubic root of 42522231 is about 349.0374395731.

Adding to 42522231 its reverse (13222524), we get a palindrome (55744755).

The spelling of 42522231 in words is "forty-two million, five hundred twenty-two thousand, two hundred thirty-one".