16316551 has 2 divisors, whose sum is σ = 16316552. Its totient is φ = 16316550.

The previous prime is 16316507. The next prime is 16316569. The reversal of 16316551 is 15561361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16316551 - 2¹³ = 16308359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16316501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8158275 + 8158276.

It is an arithmetic number, because the mean of its divisors is an integer number (8158276).

Almost surely, 2^16316551 is an apocalyptic number.

16316551 is a deficient number, since it is larger than the sum of its proper divisors (1).

16316551 is an equidigital number, since it uses as much as digits as its factorization.

16316551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 28.

The square root of 16316551 is about 4039.3750754294. The cubic root of 16316551 is about 253.6351583026.

It can be divided in two parts, 163165 and 51, that added together give a square (163216 = 404²).

The spelling of 16316551 in words is "sixteen million, three hundred sixteen thousand, five hundred fifty-one".