116551 has 4 divisors (see below), whose sum is σ = 120600. Its totient is φ = 112504.

The previous prime is 116549. The next prime is 116579. The reversal of 116551 is 155611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155611 = 61 ⋅2551.

It is a cyclic number.

It is not a de Polignac number, because 116551 - 2¹ = 116549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1981 + ... + 2038.

It is an arithmetic number, because the mean of its divisors is an integer number (30150).

2¹¹⁶⁵⁵¹ is an apocalyptic number.

116551 is a deficient number, since it is larger than the sum of its proper divisors (4049).

116551 is an equidigital number, since it uses as much as digits as its factorization.

116551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048.

The product of its digits is 150, while the sum is 19.

The square root of 116551 is about 341.3956648817. The cubic root of 116551 is about 48.8470868189.

Subtracting 116551 from its reverse (155611), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 116551 in words is "one hundred sixteen thousand, five hundred fifty-one".