158031331 has 2 divisors, whose sum is σ = 158031332. Its totient is φ = 158031330.

The previous prime is 158031311. The next prime is 158031373. The reversal of 158031331 is 133130851.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 158031331 - 2⁹ = 158030819 is a prime.

It is a super-2 number, since 2×158031331² = 49947803155263122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 158031296 and 158031305.

It is not a weakly prime, because it can be changed into another prime (158031311) 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, 79015665 + 79015666.

It is an arithmetic number, because the mean of its divisors is an integer number (79015666).

Almost surely, 2^158031331 is an apocalyptic number.

158031331 is a deficient number, since it is larger than the sum of its proper divisors (1).

158031331 is an equidigital number, since it uses as much as digits as its factorization.

158031331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 158031331 is about 12571.0513084626. The cubic root of 158031331 is about 540.6477492114.

The spelling of 158031331 in words is "one hundred fifty-eight million, thirty-one thousand, three hundred thirty-one".