117523221 has 8 divisors (see below), whose sum is σ = 159353760. Its totient is φ = 77020752.

The previous prime is 117523213. The next prime is 117523223. The reversal of 117523221 is 122325711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117523221 - 2³ = 117523213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 117523191 and 117523200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117523223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331810 + ... + 332163.

It is an arithmetic number, because the mean of its divisors is an integer number (19919220).

Almost surely, 2^117523221 is an apocalyptic number.

It is an amenable number.

117523221 is a deficient number, since it is larger than the sum of its proper divisors (41830539).

117523221 is an equidigital number, since it uses as much as digits as its factorization.

117523221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664035.

The product of its digits is 840, while the sum is 24.

The square root of 117523221 is about 10840.8127462843. The cubic root of 117523221 is about 489.8253174368.

Adding to 117523221 its reverse (122325711), we get a palindrome (239848932).

The spelling of 117523221 in words is "one hundred seventeen million, five hundred twenty-three thousand, two hundred twenty-one".