42722225 has 48 divisors (see below), whose sum is σ = 66245760. Its totient is φ = 26611200.

The previous prime is 42722221. The next prime is 42722233. The reversal of 42722225 is 52222724.

It is not a de Polignac number, because 42722225 - 2² = 42722221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42722194 and 42722203.

It is not an unprimeable number, because it can be changed into a prime (42722221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 202370 + ... + 202580.

It is an arithmetic number, because the mean of its divisors is an integer number (1380120).

Almost surely, 2^42722225 is an apocalyptic number.

It is an amenable number.

42722225 is a deficient number, since it is larger than the sum of its proper divisors (23523535).

42722225 is a wasteful number, since it uses less digits than its factorization.

42722225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 325 counting only the distinct ones).

The product of its digits is 4480, while the sum is 26.

The square root of 42722225 is about 6536.2240628669. The cubic root of 42722225 is about 349.5837909677.

Adding to 42722225 its reverse (52222724), we get a palindrome (94944949).

The spelling of 42722225 in words is "forty-two million, seven hundred twenty-two thousand, two hundred twenty-five".