40255687 has 2 divisors, whose sum is σ = 40255688. Its totient is φ = 40255686.

The previous prime is 40255637. The next prime is 40255703. The reversal of 40255687 is 78655204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40255687 - 2²³ = 31867079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40255637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20127843 + 20127844.

It is an arithmetic number, because the mean of its divisors is an integer number (20127844).

Almost surely, 2^40255687 is an apocalyptic number.

40255687 is a deficient number, since it is larger than the sum of its proper divisors (1).

40255687 is an equidigital number, since it uses as much as digits as its factorization.

40255687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 40255687 is about 6344.7369527822. The cubic root of 40255687 is about 342.7223398711.

The spelling of 40255687 in words is "forty million, two hundred fifty-five thousand, six hundred eighty-seven".