40107221 has 16 divisors (see below), whose sum is σ = 50319360. Its totient is φ = 31055280.

The previous prime is 40107217. The next prime is 40107229. The reversal of 40107221 is 12270104.

It is a cyclic number.

It is not a de Polignac number, because 40107221 - 2² = 40107217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40107221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40107229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11300 + ... + 14418.

It is an arithmetic number, because the mean of its divisors is an integer number (3144960).

Almost surely, 2^40107221 is an apocalyptic number.

It is an amenable number.

40107221 is a deficient number, since it is larger than the sum of its proper divisors (10212139).

40107221 is a wasteful number, since it uses less digits than its factorization.

40107221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 40107221 is about 6333.0262118516. The cubic root of 40107221 is about 342.3004922585.

Adding to 40107221 its reverse (12270104), we get a palindrome (52377325).

The spelling of 40107221 in words is "forty million, one hundred seven thousand, two hundred twenty-one".