158555081 has 2 divisors, whose sum is σ = 158555082. Its totient is φ = 158555080.

The previous prime is 158555053. The next prime is 158555083. The reversal of 158555081 is 180555851.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158357056 + 198025 = 12584^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 158555081 - 2¹⁴ = 158538697 is a prime.

It is a super-2 number, since 2×158555081² = 50279427421833122, which contains 22 as substring.

Together with 158555083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (158555083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79277540 + 79277541.

It is an arithmetic number, because the mean of its divisors is an integer number (79277541).

Almost surely, 2^158555081 is an apocalyptic number.

It is an amenable number.

158555081 is a deficient number, since it is larger than the sum of its proper divisors (1).

158555081 is an equidigital number, since it uses as much as digits as its factorization.

158555081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40000, while the sum is 38.

The square root of 158555081 is about 12591.8656679620. The cubic root of 158555081 is about 541.2443651041.

The spelling of 158555081 in words is "one hundred fifty-eight million, five hundred fifty-five thousand, eighty-one".