321616123 has 4 divisors (see below), whose sum is σ = 321748648. Its totient is φ = 321483600.

The previous prime is 321616121. The next prime is 321616151.

321616123 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 321616123 - 2¹ = 321616121 is a prime.

It is a super-2 number, since 2×321616123² = 206873861147102258, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321616121) 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, 62553 + ... + 67498.

It is an arithmetic number, because the mean of its divisors is an integer number (80437162).

Almost surely, 2^321616123 is an apocalyptic number.

321616123 is a deficient number, since it is larger than the sum of its proper divisors (132525).

321616123 is a wasteful number, since it uses less digits than its factorization.

321616123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132524.

The product of its digits is 1296, while the sum is 25.

The square root of 321616123 is about 17933.6589406624. The cubic root of 321616123 is about 685.1399170739.

The spelling of 321616123 in words is "three hundred twenty-one million, six hundred sixteen thousand, one hundred twenty-three".