16381307251 has 2 divisors, whose sum is σ = 16381307252. Its totient is φ = 16381307250.

The previous prime is 16381307213. The next prime is 16381307279. The reversal of 16381307251 is 15270318361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16381307251 - 2⁷ = 16381307123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16381307251.

It is not a weakly prime, because it can be changed into another prime (16381307051) 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 as a sum of consecutive naturals, namely, 8190653625 + 8190653626.

It is an arithmetic number, because the mean of its divisors is an integer number (8190653626).

Almost surely, 2^16381307251 is an apocalyptic number.

16381307251 is a deficient number, since it is larger than the sum of its proper divisors (1).

16381307251 is an equidigital number, since it uses as much as digits as its factorization.

16381307251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 16381307251 in words is "sixteen billion, three hundred eighty-one million, three hundred seven thousand, two hundred fifty-one".