158201971 has 2 divisors, whose sum is σ = 158201972. Its totient is φ = 158201970.

The previous prime is 158201963. The next prime is 158202001. The reversal of 158201971 is 179102851.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (179102851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158201971 - 2³ = 158201963 is a prime.

It is not a weakly prime, because it can be changed into another prime (158211971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79100985 + 79100986.

It is an arithmetic number, because the mean of its divisors is an integer number (79100986).

Almost surely, 2^158201971 is an apocalyptic number.

158201971 is a deficient number, since it is larger than the sum of its proper divisors (1).

158201971 is an equidigital number, since it uses as much as digits as its factorization.

158201971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 158201971 is about 12577.8364991758. The cubic root of 158201971 is about 540.8422738154.

The spelling of 158201971 in words is "one hundred fifty-eight million, two hundred one thousand, nine hundred seventy-one".