158171551 has 2 divisors, whose sum is σ = 158171552. Its totient is φ = 158171550.

The previous prime is 158171543. The next prime is 158171593. The reversal of 158171551 is 155171851.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (155171851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158171551 - 2³ = 158171543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158171521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79085775 + 79085776.

It is an arithmetic number, because the mean of its divisors is an integer number (79085776).

Almost surely, 2^158171551 is an apocalyptic number.

158171551 is a deficient number, since it is larger than the sum of its proper divisors (1).

158171551 is an equidigital number, since it uses as much as digits as its factorization.

158171551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7000, while the sum is 34.

The square root of 158171551 is about 12576.6271710662. The cubic root of 158171551 is about 540.8076061550.

The spelling of 158171551 in words is "one hundred fifty-eight million, one hundred seventy-one thousand, five hundred fifty-one".