40225909 has 2 divisors, whose sum is σ = 40225910. Its totient is φ = 40225908.

The previous prime is 40225891. The next prime is 40225921. The reversal of 40225909 is 90952204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33097009 + 7128900 = 5753^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 40225909 - 2¹⁵ = 40193141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40225709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20112954 + 20112955.

It is an arithmetic number, because the mean of its divisors is an integer number (20112955).

Almost surely, 2^40225909 is an apocalyptic number.

It is an amenable number.

40225909 is a deficient number, since it is larger than the sum of its proper divisors (1).

40225909 is an equidigital number, since it uses as much as digits as its factorization.

40225909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 40225909 is about 6342.3898492603. The cubic root of 40225909 is about 342.6378126564.

The spelling of 40225909 in words is "forty million, two hundred twenty-five thousand, nine hundred nine".