40224421 has 8 divisors (see below), whose sum is σ = 41797080. Its totient is φ = 38664192.

The previous prime is 40224413. The next prime is 40224427. The reversal of 40224421 is 12442204.

40224421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 408321 + 39816100 = 639^2 + 6310^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40224421 - 2³ = 40224413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40224427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3781 + ... + 9733.

It is an arithmetic number, because the mean of its divisors is an integer number (5224635).

Almost surely, 2^40224421 is an apocalyptic number.

It is an amenable number.

40224421 is a deficient number, since it is larger than the sum of its proper divisors (1572659).

40224421 is a wasteful number, since it uses less digits than its factorization.

40224421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6215.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 40224421 is about 6342.2725422359. The cubic root of 40224421 is about 342.6335877562.

Adding to 40224421 its reverse (12442204), we get a palindrome (52666625).

The spelling of 40224421 in words is "forty million, two hundred twenty-four thousand, four hundred twenty-one".