40355221 has 8 divisors (see below), whose sum is σ = 43176800. Its totient is φ = 37603440.

The previous prime is 40355177. The next prime is 40355261. The reversal of 40355221 is 12255304.

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 40355221 - 2⁹ = 40354709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40355192 and 40355201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40355261) 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, 16251 + ... + 18568.

It is an arithmetic number, because the mean of its divisors is an integer number (5397100).

Almost surely, 2^40355221 is an apocalyptic number.

It is an amenable number.

40355221 is a deficient number, since it is larger than the sum of its proper divisors (2821579).

40355221 is a wasteful number, since it uses less digits than its factorization.

40355221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34899.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 40355221 is about 6352.5759342176. The cubic root of 40355221 is about 343.0045728636.

The spelling of 40355221 in words is "forty million, three hundred fifty-five thousand, two hundred twenty-one".