158131361 has 2 divisors, whose sum is σ = 158131362. Its totient is φ = 158131360.

The previous prime is 158131349. The next prime is 158131367. The reversal of 158131361 is 163131851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102718225 + 55413136 = 10135^2 + 7444^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158131361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (158131367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79065680 + 79065681.

It is an arithmetic number, because the mean of its divisors is an integer number (79065681).

Almost surely, 2^158131361 is an apocalyptic number.

It is an amenable number.

158131361 is a deficient number, since it is larger than the sum of its proper divisors (1).

158131361 is an equidigital number, since it uses as much as digits as its factorization.

158131361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 158131361 is about 12575.0292643795. The cubic root of 158131361 is about 540.7617974561.

The spelling of 158131361 in words is "one hundred fifty-eight million, one hundred thirty-one thousand, three hundred sixty-one".