161216235 has 48 divisors (see below), whose sum is σ = 296268960. Its totient is φ = 80870400.

The previous prime is 161216189. The next prime is 161216239. The reversal of 161216235 is 532612161.

161216235 is a `hidden beast` number, since 1 + 612 + 16 + 2 + 35 = 666.

It is not a de Polignac number, because 161216235 - 2¹¹ = 161214187 is a prime.

It is a super-3 number, since 3×161216235³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161216199 and 161216208.

It is not an unprimeable number, because it can be changed into a prime (161216239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133635 + ... + 134835.

It is an arithmetic number, because the mean of its divisors is an integer number (6172270).

Almost surely, 2^161216235 is an apocalyptic number.

161216235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161216235 is a deficient number, since it is larger than the sum of its proper divisors (135052725).

161216235 is a wasteful number, since it uses less digits than its factorization.

161216235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388 (or 1385 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 161216235 is about 12697.0955340188. The cubic root of 161216235 is about 544.2556232239.

Adding to 161216235 its reverse (532612161), we get a palindrome (693828396).

The spelling of 161216235 in words is "one hundred sixty-one million, two hundred sixteen thousand, two hundred thirty-five".