40221424 has 10 divisors (see below), whose sum is σ = 77929040. Its totient is φ = 20110704.

The previous prime is 40221409. The next prime is 40221431. The reversal of 40221424 is 42412204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256904 + ... + 1256935.

It is an arithmetic number, because the mean of its divisors is an integer number (7792904).

Almost surely, 2^40221424 is an apocalyptic number.

It is an amenable number.

40221424 is a deficient number, since it is larger than the sum of its proper divisors (37707616).

40221424 is a wasteful number, since it uses less digits than its factorization.

40221424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513847 (or 2513841 counting only the distinct ones).

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

The square root of 40221424 is about 6342.0362660584. The cubic root of 40221424 is about 342.6250780139.

Adding to 40221424 its reverse (42412204), we get a palindrome (82633628).

The spelling of 40221424 in words is "forty million, two hundred twenty-one thousand, four hundred twenty-four".