86550551 has 2 divisors, whose sum is σ = 86550552. Its totient is φ = 86550550.

The previous prime is 86550539. The next prime is 86550557. The reversal of 86550551 is 15505568.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86550551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86550557) 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, 43275275 + 43275276.

It is an arithmetic number, because the mean of its divisors is an integer number (43275276).

Almost surely, 2^86550551 is an apocalyptic number.

86550551 is a deficient number, since it is larger than the sum of its proper divisors (1).

86550551 is an equidigital number, since it uses as much as digits as its factorization.

86550551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 86550551 is about 9303.2548605313. The cubic root of 86550551 is about 442.3404061283.

The spelling of 86550551 in words is "eighty-six million, five hundred fifty thousand, five hundred fifty-one".