85854551 has 2 divisors, whose sum is σ = 85854552. Its totient is φ = 85854550.

The previous prime is 85854493. The next prime is 85854569. The reversal of 85854551 is 15545858.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85854551 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 85854499 and 85854508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85854151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42927275 + 42927276.

It is an arithmetic number, because the mean of its divisors is an integer number (42927276).

Almost surely, 2^85854551 is an apocalyptic number.

85854551 is a deficient number, since it is larger than the sum of its proper divisors (1).

85854551 is an equidigital number, since it uses as much as digits as its factorization.

85854551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160000, while the sum is 41.

The square root of 85854551 is about 9265.7730924084. The cubic root of 85854551 is about 441.1515137300.

The spelling of 85854551 in words is "eighty-five million, eight hundred fifty-four thousand, five hundred fifty-one".