40502221 has 2 divisors, whose sum is σ = 40502222. Its totient is φ = 40502220.

The previous prime is 40502201. The next prime is 40502239. The reversal of 40502221 is 12220504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24860196 + 15642025 = 4986^2 + 3955^2 .

It is a cyclic number.

It is not a de Polignac number, because 40502221 - 2⁹ = 40501709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40502195 and 40502204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40502201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20251110 + 20251111.

It is an arithmetic number, because the mean of its divisors is an integer number (20251111).

Almost surely, 2^40502221 is an apocalyptic number.

It is an amenable number.

40502221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40502221 is an equidigital number, since it uses as much as digits as its factorization.

40502221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 40502221 is about 6364.1355265268. The cubic root of 40502221 is about 343.4205502076.

Adding to 40502221 its reverse (12220504), we get a palindrome (52722725).

The spelling of 40502221 in words is "forty million, five hundred two thousand, two hundred twenty-one".