40260221 has 4 divisors (see below), whose sum is σ = 42379200. Its totient is φ = 38141244.

The previous prime is 40260203. The next prime is 40260223. The reversal of 40260221 is 12206204.

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 a de Polignac number, because none of the positive numbers 2^k-40260221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40260221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40260223) 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, 1059461 + ... + 1059498.

It is an arithmetic number, because the mean of its divisors is an integer number (10594800).

Almost surely, 2^40260221 is an apocalyptic number.

It is an amenable number.

40260221 is a deficient number, since it is larger than the sum of its proper divisors (2118979).

40260221 is a wasteful number, since it uses less digits than its factorization.

40260221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118978.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40260221 is about 6345.0942467390. The cubic root of 40260221 is about 342.7352063327.

Adding to 40260221 its reverse (12206204), we get a palindrome (52466425).

The spelling of 40260221 in words is "forty million, two hundred sixty thousand, two hundred twenty-one".