158551 has 2 divisors, whose sum is σ = 158552. Its totient is φ = 158550.

The previous prime is 158537. The next prime is 158563. The reversal of 158551 is 155851.

It is a strong prime.

It is an emirp because it is prime and its reverse (155851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158551 - 2⁵ = 158519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79275 + 79276.

It is an arithmetic number, because the mean of its divisors is an integer number (79276).

2¹⁵⁸⁵⁵¹ is an apocalyptic number.

158551 is a deficient number, since it is larger than the sum of its proper divisors (1).

158551 is an equidigital number, since it uses as much as digits as its factorization.

158551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1000, while the sum is 25.

The square root of 158551 is about 398.1846305422. The cubic root of 158551 is about 54.1239721424.

The spelling of 158551 in words is "one hundred fifty-eight thousand, five hundred fifty-one".