158128331 has 2 divisors, whose sum is σ = 158128332. Its totient is φ = 158128330.

The previous prime is 158128301. The next prime is 158128337. The reversal of 158128331 is 133821851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 158128331 - 2¹⁸ = 157866187 is a prime.

It is a super-2 number, since 2×158128331² = 50009138129691122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (158128337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79064165 + 79064166.

It is an arithmetic number, because the mean of its divisors is an integer number (79064166).

Almost surely, 2^158128331 is an apocalyptic number.

158128331 is a deficient number, since it is larger than the sum of its proper divisors (1).

158128331 is an equidigital number, since it uses as much as digits as its factorization.

158128331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 158128331 is about 12574.9087869455. The cubic root of 158128331 is about 540.7583435372.

The spelling of 158128331 in words is "one hundred fifty-eight million, one hundred twenty-eight thousand, three hundred thirty-one".