16214560181 has 2 divisors, whose sum is σ = 16214560182. Its totient is φ = 16214560180.

The previous prime is 16214560147. The next prime is 16214560189. The reversal of 16214560181 is 18106541261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15917859556 + 296700625 = 126166^2 + 17225^2 .

It is an emirp because it is prime and its reverse (18106541261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16214560181 - 2¹⁰ = 16214559157 is a prime.

It is a super-2 number, since 2×16214560181² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16214560189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8107280090 + 8107280091.

It is an arithmetic number, because the mean of its divisors is an integer number (8107280091).

Almost surely, 2^16214560181 is an apocalyptic number.

It is an amenable number.

16214560181 is a deficient number, since it is larger than the sum of its proper divisors (1).

16214560181 is an equidigital number, since it uses as much as digits as its factorization.

16214560181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 16214560181 in words is "sixteen billion, two hundred fourteen million, five hundred sixty thousand, one hundred eighty-one".