40224821 has 8 divisors (see below), whose sum is σ = 49507584. Its totient is φ = 31826160.

The previous prime is 40224797. The next prime is 40224851. The reversal of 40224821 is 12842204.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40224821 - 2⁶ = 40224757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40224851) 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, 220925 + ... + 221106.

It is an arithmetic number, because the mean of its divisors is an integer number (6188448).

Almost surely, 2^40224821 is an apocalyptic number.

It is an amenable number.

40224821 is a deficient number, since it is larger than the sum of its proper divisors (9282763).

40224821 is a wasteful number, since it uses less digits than its factorization.

40224821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442051.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 40224821 is about 6342.3040765955. The cubic root of 40224821 is about 342.6347234923.

The spelling of 40224821 in words is "forty million, two hundred twenty-four thousand, eight hundred twenty-one".