40117221 has 16 divisors (see below), whose sum is σ = 62017920. Its totient is φ = 25581600.

The previous prime is 40117211. The next prime is 40117249. The reversal of 40117221 is 12271104.

It is not a de Polignac number, because 40117221 - 2⁶ = 40117157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40117194 and 40117203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40117211) 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, 31680 + ... + 32921.

It is an arithmetic number, because the mean of its divisors is an integer number (3876120).

Almost surely, 2^40117221 is an apocalyptic number.

It is an amenable number.

40117221 is a deficient number, since it is larger than the sum of its proper divisors (21900699).

40117221 is a wasteful number, since it uses less digits than its factorization.

40117221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64633 (or 64627 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 40117221 is about 6333.8156746151. The cubic root of 40117221 is about 342.3289386778.

Adding to 40117221 its reverse (12271104), we get a palindrome (52388325).

The spelling of 40117221 in words is "forty million, one hundred seventeen thousand, two hundred twenty-one".