158020111 has 4 divisors (see below), whose sum is σ = 158057424. Its totient is φ = 157982800.

The previous prime is 158020099. The next prime is 158020127. The reversal of 158020111 is 111020851.

It is a happy number.

158020111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111020851 = 191 ⋅581261.

It is a cyclic number.

It is not a de Polignac number, because 158020111 - 2¹⁵ = 157987343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158020171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11350 + ... + 21091.

It is an arithmetic number, because the mean of its divisors is an integer number (39514356).

Almost surely, 2^158020111 is an apocalyptic number.

158020111 is a deficient number, since it is larger than the sum of its proper divisors (37313).

158020111 is an equidigital number, since it uses as much as digits as its factorization.

158020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37312.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 158020111 is about 12570.6050371492. The cubic root of 158020111 is about 540.6349538346.

Adding to 158020111 its reverse (111020851), we get a palindrome (269040962).

The spelling of 158020111 in words is "one hundred fifty-eight million, twenty thousand, one hundred eleven".