216013161 has 16 divisors (see below), whose sum is σ = 354483584. Its totient is φ = 113940864.

The previous prime is 216013153. The next prime is 216013207. The reversal of 216013161 is 161310612.

It is not a de Polignac number, because 216013161 - 2³ = 216013153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (216013111) 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, 395356 + ... + 395901.

It is an arithmetic number, because the mean of its divisors is an integer number (22155224).

Almost surely, 2^216013161 is an apocalyptic number.

216013161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

216013161 is a deficient number, since it is larger than the sum of its proper divisors (138470423).

216013161 is a wasteful number, since it uses less digits than its factorization.

216013161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791280.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 216013161 is about 14697.3861961915. The cubic root of 216013161 is about 600.0121858636.

Adding to 216013161 its reverse (161310612), we get a palindrome (377323773).

The spelling of 216013161 in words is "two hundred sixteen million, thirteen thousand, one hundred sixty-one".