40522221 has 8 divisors (see below), whose sum is σ = 60032960. Its totient is φ = 27014796.

The previous prime is 40522219. The next prime is 40522259. The reversal of 40522221 is 12222504.

It is not a de Polignac number, because 40522221 - 2¹ = 40522219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40522194 and 40522203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40522201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750385 + ... + 750438.

It is an arithmetic number, because the mean of its divisors is an integer number (7504120).

Almost surely, 2^40522221 is an apocalyptic number.

It is an amenable number.

40522221 is a deficient number, since it is larger than the sum of its proper divisors (19510739).

40522221 is a wasteful number, since it uses less digits than its factorization.

40522221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500832 (or 1500826 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40522221 is about 6365.7066379154. The cubic root of 40522221 is about 343.4770679376.

Adding to 40522221 its reverse (12222504), we get a palindrome (52744725).

The spelling of 40522221 in words is "forty million, five hundred twenty-two thousand, two hundred twenty-one".