16161312 has 24 divisors (see below), whose sum is σ = 42423696. Its totient is φ = 5387072.

The previous prime is 16161311. The next prime is 16161319. The reversal of 16161312 is 21316161.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×16161312² = 522376011122688, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (16161311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84078 + ... + 84269.

It is an arithmetic number, because the mean of its divisors is an integer number (1767654).

Almost surely, 2^16161312 is an apocalyptic number.

16161312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16161312 is an abundant number, since it is smaller than the sum of its proper divisors (26262384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16161312 is a wasteful number, since it uses less digits than its factorization.

16161312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168360 (or 168352 counting only the distinct ones).

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

The square root of 16161312 is about 4020.1134312355. The cubic root of 16161312 is about 252.8282148181.

Adding to 16161312 its reverse (21316161), we get a palindrome (37477473).

The spelling of 16161312 in words is "sixteen million, one hundred sixty-one thousand, three hundred twelve".