158515561 has 8 divisors (see below), whose sum is σ = 160363584. Its totient is φ = 156673200.

The previous prime is 158515559. The next prime is 158515571. The reversal of 158515561 is 165515851.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158515561 - 2¹ = 158515559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 158515561.

It is not an unprimeable number, because it can be changed into a prime (158515571) 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 7 ways as a sum of consecutive naturals, for example, 82170 + ... + 84076.

It is an arithmetic number, because the mean of its divisors is an integer number (20045448).

Almost surely, 2^158515561 is an apocalyptic number.

It is an amenable number.

158515561 is a deficient number, since it is larger than the sum of its proper divisors (1848023).

158515561 is a wasteful number, since it uses less digits than its factorization.

158515561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831.

The product of its digits is 30000, while the sum is 37.

The square root of 158515561 is about 12590.2963031058. The cubic root of 158515561 is about 541.1993928152.

It can be divided in two parts, 15851 and 5561, that added together give a palindrome (21412).

The spelling of 158515561 in words is "one hundred fifty-eight million, five hundred fifteen thousand, five hundred sixty-one".