40055539 has 2 divisors, whose sum is σ = 40055540. Its totient is φ = 40055538.

The previous prime is 40055507. The next prime is 40055569. The reversal of 40055539 is 93555004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40055539 - 2⁵ = 40055507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40055539.

It is not a weakly prime, because it can be changed into another prime (40055569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20027769 + 20027770.

It is an arithmetic number, because the mean of its divisors is an integer number (20027770).

Almost surely, 2^40055539 is an apocalyptic number.

40055539 is a deficient number, since it is larger than the sum of its proper divisors (1).

40055539 is an equidigital number, since it uses as much as digits as its factorization.

40055539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 40055539 is about 6328.9445407588. The cubic root of 40055539 is about 342.1534000575.

The spelling of 40055539 in words is "forty million, fifty-five thousand, five hundred thirty-nine".