116657221 has 4 divisors (see below), whose sum is σ = 116682444. Its totient is φ = 116632000.

The previous prime is 116657209. The next prime is 116657239. The reversal of 116657221 is 122756611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89094721 + 27562500 = 9439^2 + 5250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-116657221 is a prime.

It is a super-2 number, since 2×116657221² = 27217814422885682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116655221) 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, 3460 + ... + 15661.

It is an arithmetic number, because the mean of its divisors is an integer number (29170611).

Almost surely, 2^116657221 is an apocalyptic number.

It is an amenable number.

116657221 is a deficient number, since it is larger than the sum of its proper divisors (25223).

116657221 is an equidigital number, since it uses as much as digits as its factorization.

116657221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25222.

The product of its digits is 5040, while the sum is 31.

The square root of 116657221 is about 10800.7972390930. The cubic root of 116657221 is about 488.6192155784.

The spelling of 116657221 in words is "one hundred sixteen million, six hundred fifty-seven thousand, two hundred twenty-one".