161520827 has 8 divisors (see below), whose sum is σ = 174049680. Its totient is φ = 149006880.

The previous prime is 161520809. The next prime is 161520841. The reversal of 161520827 is 728025161.

161520827 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161520827 - 2¹⁰ = 161519803 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161520793 and 161520802.

It is not an unprimeable number, because it can be changed into a prime (161520847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30449 + ... + 35357.

It is an arithmetic number, because the mean of its divisors is an integer number (21756210).

Almost surely, 2^161520827 is an apocalyptic number.

161520827 is a deficient number, since it is larger than the sum of its proper divisors (12528853).

161520827 is a wasteful number, since it uses less digits than its factorization.

161520827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7453.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 161520827 is about 12709.0844280774. The cubic root of 161520827 is about 544.5981685760.

Adding to 161520827 its reverse (728025161), we get a palindrome (889545988).

The spelling of 161520827 in words is "one hundred sixty-one million, five hundred twenty thousand, eight hundred twenty-seven".