16321554211 has 4 divisors (see below), whose sum is σ = 17180583400. Its totient is φ = 15462525024.

The previous prime is 16321554203. The next prime is 16321554241. The reversal of 16321554211 is 11245512361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16321554211 - 2³ = 16321554203 is a prime.

It is a super-2 number, since 2×16321554211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16321554241) 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 3 ways as a sum of consecutive naturals, for example, 429514566 + ... + 429514603.

It is an arithmetic number, because the mean of its divisors is an integer number (4295145850).

Almost surely, 2^16321554211 is an apocalyptic number.

16321554211 is a deficient number, since it is larger than the sum of its proper divisors (859029189).

16321554211 is an equidigital number, since it uses as much as digits as its factorization.

16321554211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859029188.

The product of its digits is 7200, while the sum is 31.

The spelling of 16321554211 in words is "sixteen billion, three hundred twenty-one million, five hundred fifty-four thousand, two hundred eleven".