158631241 has 2 divisors, whose sum is σ = 158631242. Its totient is φ = 158631240.

The previous prime is 158631229. The next prime is 158631259. The reversal of 158631241 is 142136851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117939600 + 40691641 = 10860^2 + 6379^2 .

It is an emirp because it is prime and its reverse (142136851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158631241 - 2⁷ = 158631113 is a prime.

It is not a weakly prime, because it can be changed into another prime (158631041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79315620 + 79315621.

It is an arithmetic number, because the mean of its divisors is an integer number (79315621).

Almost surely, 2^158631241 is an apocalyptic number.

It is an amenable number.

158631241 is a deficient number, since it is larger than the sum of its proper divisors (1).

158631241 is an equidigital number, since it uses as much as digits as its factorization.

158631241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 158631241 is about 12594.8894794675. The cubic root of 158631241 is about 541.3310112763.

The spelling of 158631241 in words is "one hundred fifty-eight million, six hundred thirty-one thousand, two hundred forty-one".