158215649 has 2 divisors, whose sum is σ = 158215650. Its totient is φ = 158215648.

The previous prime is 158215637. The next prime is 158215693. The reversal of 158215649 is 946512851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128709025 + 29506624 = 11345^2 + 5432^2 .

It is an emirp because it is prime and its reverse (946512851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158215649 - 2¹² = 158211553 is a prime.

It is not a weakly prime, because it can be changed into another prime (158215699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79107824 + 79107825.

It is an arithmetic number, because the mean of its divisors is an integer number (79107825).

Almost surely, 2^158215649 is an apocalyptic number.

It is an amenable number.

158215649 is a deficient number, since it is larger than the sum of its proper divisors (1).

158215649 is an equidigital number, since it uses as much as digits as its factorization.

158215649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 41.

The square root of 158215649 is about 12578.3802216343. The cubic root of 158215649 is about 540.8578602782.

The spelling of 158215649 in words is "one hundred fifty-eight million, two hundred fifteen thousand, six hundred forty-nine".