161000215 has 4 divisors (see below), whose sum is σ = 193200264. Its totient is φ = 128800168.

The previous prime is 161000197. The next prime is 161000219. The reversal of 161000215 is 512000161.

It is a happy number.

161000215 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161000215 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 (161000219) 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, 16100017 + ... + 16100026.

It is an arithmetic number, because the mean of its divisors is an integer number (48300066).

Almost surely, 2^161000215 is an apocalyptic number.

161000215 is a deficient number, since it is larger than the sum of its proper divisors (32200049).

161000215 is an equidigital number, since it uses as much as digits as its factorization.

161000215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32200048.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 161000215 is about 12688.5860126336. The cubic root of 161000215 is about 544.0124247000.

Adding to 161000215 its reverse (512000161), we get a palindrome (673000376).

The spelling of 161000215 in words is "one hundred sixty-one million, two hundred fifteen", and thus it is an aban number.