316321661 has 8 divisors (see below), whose sum is σ = 322074624. Its totient is φ = 310587120.

The previous prime is 316321657. The next prime is 316321667. The reversal of 316321661 is 166123613.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 316321661 - 2² = 316321657 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 (316321667) by changing a digit.

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, 32756 + ... + 41298.

It is an arithmetic number, because the mean of its divisors is an integer number (40259328).

Almost surely, 2^316321661 is an apocalyptic number.

It is an amenable number.

316321661 is a deficient number, since it is larger than the sum of its proper divisors (5752963).

316321661 is an equidigital number, since it uses as much as digits as its factorization.

316321661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9211.

The product of its digits is 3888, while the sum is 29.

The square root of 316321661 is about 17785.4339559090. The cubic root of 316321661 is about 681.3594925882.

The spelling of 316321661 in words is "three hundred sixteen million, three hundred twenty-one thousand, six hundred sixty-one".