40839251 has 2 divisors, whose sum is σ = 40839252. Its totient is φ = 40839250.

The previous prime is 40839233. The next prime is 40839257. The reversal of 40839251 is 15293804.

40839251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40839251 - 2⁶ = 40839187 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40839257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20419625 + 20419626.

It is an arithmetic number, because the mean of its divisors is an integer number (20419626).

Almost surely, 2^40839251 is an apocalyptic number.

40839251 is a deficient number, since it is larger than the sum of its proper divisors (1).

40839251 is an equidigital number, since it uses as much as digits as its factorization.

40839251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 40839251 is about 6390.5595216694. The cubic root of 40839251 is about 344.3704854465.

The spelling of 40839251 in words is "forty million, eight hundred thirty-nine thousand, two hundred fifty-one".