40175221 has 2 divisors, whose sum is σ = 40175222. Its totient is φ = 40175220.

The previous prime is 40175207. The next prime is 40175243. The reversal of 40175221 is 12257104.

It is a happy number.

It is an a-pointer prime, because the next prime (40175243) can be obtained adding 40175221 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38254225 + 1920996 = 6185^2 + 1386^2 .

It is a cyclic number.

It is not a de Polignac number, because 40175221 - 2⁵ = 40175189 is a prime.

It is a super-2 number, since 2×40175221² = 3228096764797682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40175192 and 40175201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40175251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20087610 + 20087611.

It is an arithmetic number, because the mean of its divisors is an integer number (20087611).

Almost surely, 2^40175221 is an apocalyptic number.

It is an amenable number.

40175221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40175221 is an equidigital number, since it uses as much as digits as its factorization.

40175221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 40175221 is about 6338.3926195842. The cubic root of 40175221 is about 342.4938347586.

The spelling of 40175221 in words is "forty million, one hundred seventy-five thousand, two hundred twenty-one".