117021655 has 8 divisors (see below), whose sum is σ = 141092784. Its totient is φ = 93172800.

The previous prime is 117021649. The next prime is 117021691. The reversal of 117021655 is 556120711.

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

It is not a de Polignac number, because 117021655 - 2¹⁷ = 116890583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54406 + ... + 56515.

It is an arithmetic number, because the mean of its divisors is an integer number (17636598).

Almost surely, 2^117021655 is an apocalyptic number.

117021655 is a deficient number, since it is larger than the sum of its proper divisors (24071129).

117021655 is a wasteful number, since it uses less digits than its factorization.

117021655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111137.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 117021655 is about 10817.6547828076. The cubic root of 117021655 is about 489.1274977255.

The spelling of 117021655 in words is "one hundred seventeen million, twenty-one thousand, six hundred fifty-five".