158101491 has 16 divisors (see below), whose sum is σ = 215239680. Its totient is φ = 103190880.

The previous prime is 158101477. The next prime is 158101499. The reversal of 158101491 is 194101851.

It is a happy number.

It is not a de Polignac number, because 158101491 - 2¹⁵ = 158068723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158101499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109150 + ... + 110588.

It is an arithmetic number, because the mean of its divisors is an integer number (13452480).

Almost surely, 2^158101491 is an apocalyptic number.

158101491 is a deficient number, since it is larger than the sum of its proper divisors (57138189).

158101491 is a wasteful number, since it uses less digits than its factorization.

158101491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186.

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 158101491 is about 12573.8415370960. The cubic root of 158101491 is about 540.7277465001.

The spelling of 158101491 in words is "one hundred fifty-eight million, one hundred one thousand, four hundred ninety-one".