16118551 has 2 divisors, whose sum is σ = 16118552. Its totient is φ = 16118550.

The previous prime is 16118549. The next prime is 16118563. The reversal of 16118551 is 15581161.

It is a weak prime.

It is an emirp because it is prime and its reverse (15581161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16118551 - 2¹ = 16118549 is a prime.

Together with 16118549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16118591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8059275 + 8059276.

It is an arithmetic number, because the mean of its divisors is an integer number (8059276).

Almost surely, 2^16118551 is an apocalyptic number.

16118551 is a deficient number, since it is larger than the sum of its proper divisors (1).

16118551 is an equidigital number, since it uses as much as digits as its factorization.

16118551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 28.

The square root of 16118551 is about 4014.7915263436. The cubic root of 16118551 is about 252.6050329297.

The spelling of 16118551 in words is "sixteen million, one hundred eighteen thousand, five hundred fifty-one".