16451651 has 2 divisors, whose sum is σ = 16451652. Its totient is φ = 16451650.

The previous prime is 16451641. The next prime is 16451681. The reversal of 16451651 is 15615461.

It is a weak prime.

It is an emirp because it is prime and its reverse (15615461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16451651 - 2¹⁴ = 16435267 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16451641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8225825 + 8225826.

It is an arithmetic number, because the mean of its divisors is an integer number (8225826).

Almost surely, 2^16451651 is an apocalyptic number.

16451651 is a deficient number, since it is larger than the sum of its proper divisors (1).

16451651 is an equidigital number, since it uses as much as digits as its factorization.

16451651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 29.

The square root of 16451651 is about 4056.0634856964. The cubic root of 16451651 is about 254.3332627162. Note that the first 3 decimals are identical.

It can be divided in two parts, 164 and 51651, that added together give a palindrome (51815).

The spelling of 16451651 in words is "sixteen million, four hundred fifty-one thousand, six hundred fifty-one".