161520159 has 8 divisors (see below), whose sum is σ = 226695040. Its totient is φ = 102012696.

The previous prime is 161520157. The next prime is 161520173. The reversal of 161520159 is 951025161.

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

It is not a de Polignac number, because 161520159 - 2¹ = 161520157 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 (161520157) 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, 1416787 + ... + 1416900.

It is an arithmetic number, because the mean of its divisors is an integer number (28336880).

Almost surely, 2^161520159 is an apocalyptic number.

161520159 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

161520159 is a deficient number, since it is larger than the sum of its proper divisors (65174881).

161520159 is a wasteful number, since it uses less digits than its factorization.

161520159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833709.

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 161520159 is about 12709.0581476363. The cubic root of 161520159 is about 544.5974178120.

The spelling of 161520159 in words is "one hundred sixty-one million, five hundred twenty thousand, one hundred fifty-nine".