117551 has 6 divisors (see below), whose sum is σ = 136800. Its totient is φ = 100716.

The previous prime is 117541. The next prime is 117563. The reversal of 117551 is 155711.

It is a de Polignac number, because none of the positive numbers 2^k-117551 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117511) 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 in 5 ways as a sum of consecutive naturals, for example, 1151 + ... + 1248.

It is an arithmetic number, because the mean of its divisors is an integer number (22800).

2¹¹⁷⁵⁵¹ is an apocalyptic number.

117551 is a deficient number, since it is larger than the sum of its proper divisors (19249).

117551 is an equidigital number, since it uses as much as digits as its factorization.

117551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413 (or 2406 counting only the distinct ones).

The product of its digits is 175, while the sum is 20.

The square root of 117551 is about 342.8571130952. The cubic root of 117551 is about 48.9863907784.

The spelling of 117551 in words is "one hundred seventeen thousand, five hundred fifty-one".