16860551 has 2 divisors, whose sum is σ = 16860552. Its totient is φ = 16860550.

The previous prime is 16860527. The next prime is 16860589. The reversal of 16860551 is 15506861.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16860551 - 2¹⁴ = 16844167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16860511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8430275 + 8430276.

It is an arithmetic number, because the mean of its divisors is an integer number (8430276).

Almost surely, 2^16860551 is an apocalyptic number.

16860551 is a deficient number, since it is larger than the sum of its proper divisors (1).

16860551 is an equidigital number, since it uses as much as digits as its factorization.

16860551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 16860551 is about 4106.1601283925. The cubic root of 16860551 is about 256.4231638604.

The spelling of 16860551 in words is "sixteen million, eight hundred sixty thousand, five hundred fifty-one".