158015643 has 4 divisors (see below), whose sum is σ = 210687528. Its totient is φ = 105343760.

The previous prime is 158015621. The next prime is 158015677. The reversal of 158015643 is 346510851.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 158015643 - 2¹⁸ = 157753499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158015243) 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 in 3 ways as a sum of consecutive naturals, for example, 26335938 + ... + 26335943.

It is an arithmetic number, because the mean of its divisors is an integer number (52671882).

Almost surely, 2^158015643 is an apocalyptic number.

158015643 is a deficient number, since it is larger than the sum of its proper divisors (52671885).

158015643 is an equidigital number, since it uses as much as digits as its factorization.

158015643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52671884.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 158015643 is about 12570.4273197056. The cubic root of 158015643 is about 540.6298583234.

The spelling of 158015643 in words is "one hundred fifty-eight million, fifteen thousand, six hundred forty-three".