40799221 has 2 divisors, whose sum is σ = 40799222. Its totient is φ = 40799220.

The previous prime is 40799159. The next prime is 40799249. The reversal of 40799221 is 12299704.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40780996 + 18225 = 6386^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 40799221 - 2¹⁹ = 40274933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40799281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20399610 + 20399611.

It is an arithmetic number, because the mean of its divisors is an integer number (20399611).

Almost surely, 2^40799221 is an apocalyptic number.

It is an amenable number.

40799221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40799221 is an equidigital number, since it uses as much as digits as its factorization.

40799221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 40799221 is about 6387.4267901871. The cubic root of 40799221 is about 344.2579331294.

The spelling of 40799221 in words is "forty million, seven hundred ninety-nine thousand, two hundred twenty-one".