84551 has 2 divisors, whose sum is σ = 84552. Its totient is φ = 84550.

The previous prime is 84533. The next prime is 84559. The reversal of 84551 is 15548.

84551 is nontrivially palindromic in base 11.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84551 is a prime.

It is a super-3 number, since 3×84551³ = 1813332728208453, which contains 333 as substring.

84551 is an undulating number in base 11.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 84551.

It is not a weakly prime, because it can be changed into another prime (84559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42275 + 42276.

It is an arithmetic number, because the mean of its divisors is an integer number (42276).

2⁸⁴⁵⁵¹ is an apocalyptic number.

84551 is a deficient number, since it is larger than the sum of its proper divisors (1).

84551 is an equidigital number, since it uses as much as digits as its factorization.

84551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 800, while the sum is 23.

The square root of 84551 is about 290.7765465095. The cubic root of 84551 is about 43.8907413153.

The spelling of 84551 in words is "eighty-four thousand, five hundred fifty-one".