158020571 has 4 divisors (see below), whose sum is σ = 161695512. Its totient is φ = 154345632.

The previous prime is 158020543. The next prime is 158020573. The reversal of 158020571 is 175020851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175020851 = 6917 ⋅25303.

It is a cyclic number.

It is not a de Polignac number, because 158020571 - 2¹⁸ = 157758427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158020573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1837406 + ... + 1837491.

It is an arithmetic number, because the mean of its divisors is an integer number (40423878).

Almost surely, 2^158020571 is an apocalyptic number.

158020571 is a deficient number, since it is larger than the sum of its proper divisors (3674941).

158020571 is an equidigital number, since it uses as much as digits as its factorization.

158020571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674940.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 158020571 is about 12570.6233337890. The cubic root of 158020571 is about 540.6354784341.

The spelling of 158020571 in words is "one hundred fifty-eight million, twenty thousand, five hundred seventy-one".