158408531 has 2 divisors, whose sum is σ = 158408532. Its totient is φ = 158408530.

The previous prime is 158408477. The next prime is 158408557. The reversal of 158408531 is 135804851.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158408531 is a prime.

It is a super-2 number, since 2×158408531² = 50186525387155922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 158408491 and 158408500.

It is not a weakly prime, because it can be changed into another prime (158408561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79204265 + 79204266.

It is an arithmetic number, because the mean of its divisors is an integer number (79204266).

Almost surely, 2^158408531 is an apocalyptic number.

158408531 is a deficient number, since it is larger than the sum of its proper divisors (1).

158408531 is an equidigital number, since it uses as much as digits as its factorization.

158408531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 158408531 is about 12586.0450897015. The cubic root of 158408531 is about 541.0775591133.

The spelling of 158408531 in words is "one hundred fifty-eight million, four hundred eight thousand, five hundred thirty-one".