40200221 has 4 divisors (see below), whose sum is σ = 40576032. Its totient is φ = 39824412.

The previous prime is 40200203. The next prime is 40200253. The reversal of 40200221 is 12200204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40200221 - 2⁶ = 40200157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40200421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187745 + ... + 187958.

It is an arithmetic number, because the mean of its divisors is an integer number (10144008).

Almost surely, 2^40200221 is an apocalyptic number.

It is an amenable number.

40200221 is a deficient number, since it is larger than the sum of its proper divisors (375811).

40200221 is a wasteful number, since it uses less digits than its factorization.

40200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375810.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 40200221 is about 6340.3644217032. The cubic root of 40200221 is about 342.5648617102.

Adding to 40200221 its reverse (12200204), we get a palindrome (52400425).

The spelling of 40200221 in words is "forty million, two hundred thousand, two hundred twenty-one".