158215693 has 2 divisors, whose sum is σ = 158215694. Its totient is φ = 158215692.

The previous prime is 158215649. The next prime is 158215697. The reversal of 158215693 is 396512851.

158215693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135908964 + 22306729 = 11658^2 + 4723^2 .

It is a cyclic number.

It is not a de Polignac number, because 158215693 - 2¹⁷ = 158084621 is a prime.

It is a super-2 number, since 2×158215693² = 50064411022940498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158215697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79107846 + 79107847.

It is an arithmetic number, because the mean of its divisors is an integer number (79107847).

Almost surely, 2^158215693 is an apocalyptic number.

It is an amenable number.

158215693 is a deficient number, since it is larger than the sum of its proper divisors (1).

158215693 is an equidigital number, since it uses as much as digits as its factorization.

158215693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 158215693 is about 12578.3819706670. The cubic root of 158215693 is about 540.8579104160.

The spelling of 158215693 in words is "one hundred fifty-eight million, two hundred fifteen thousand, six hundred ninety-three".