158217539 has 2 divisors, whose sum is σ = 158217540. Its totient is φ = 158217538.

The previous prime is 158217517. The next prime is 158217547. The reversal of 158217539 is 935712851.

158217539 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 a de Polignac number, because none of the positive numbers 2^k-158217539 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 158217496 and 158217505.

It is not a weakly prime, because it can be changed into another prime (158217509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79108769 + 79108770.

It is an arithmetic number, because the mean of its divisors is an integer number (79108770).

Almost surely, 2^158217539 is an apocalyptic number.

158217539 is a deficient number, since it is larger than the sum of its proper divisors (1).

158217539 is an equidigital number, since it uses as much as digits as its factorization.

158217539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 41.

The square root of 158217539 is about 12578.4553503202. The cubic root of 158217539 is about 540.8600139153.

The spelling of 158217539 in words is "one hundred fifty-eight million, two hundred seventeen thousand, five hundred thirty-nine".