40324221 has 48 divisors (see below), whose sum is σ = 73592064. Its totient is φ = 20731392.

The previous prime is 40324217. The next prime is 40324231. The reversal of 40324221 is 12242304.

40324221 is a `hidden beast` number, since 403 + 242 + 21 = 666.

It is not a de Polignac number, because 40324221 - 2² = 40324217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40324194 and 40324203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40324201) 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, 23815 + ... + 25451.

It is an arithmetic number, because the mean of its divisors is an integer number (1533168).

Almost surely, 2^40324221 is an apocalyptic number.

It is an amenable number.

40324221 is a deficient number, since it is larger than the sum of its proper divisors (33267843).

40324221 is a wasteful number, since it uses less digits than its factorization.

40324221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40324221 is about 6350.1355103651. The cubic root of 40324221 is about 342.9167208222.

Adding to 40324221 its reverse (12242304), we get a palindrome (52566525).

The spelling of 40324221 in words is "forty million, three hundred twenty-four thousand, two hundred twenty-one".