16155109 has 2 divisors, whose sum is σ = 16155110. Its totient is φ = 16155108.

The previous prime is 16155103. The next prime is 16155157. The reversal of 16155109 is 90155161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15824484 + 330625 = 3978^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 16155109 - 2⁵ = 16155077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16155103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8077554 + 8077555.

It is an arithmetic number, because the mean of its divisors is an integer number (8077555).

Almost surely, 2^16155109 is an apocalyptic number.

It is an amenable number.

16155109 is a deficient number, since it is larger than the sum of its proper divisors (1).

16155109 is an equidigital number, since it uses as much as digits as its factorization.

16155109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 16155109 is about 4019.3418615490. The cubic root of 16155109 is about 252.7958640183.

It can be divided in two parts, 1615 and 5109, that added together give a square (6724 = 82²).

The spelling of 16155109 in words is "sixteen million, one hundred fifty-five thousand, one hundred nine".