316661243 has 4 divisors (see below), whose sum is σ = 319735728. Its totient is φ = 313586760.

The previous prime is 316661197. The next prime is 316661251. The reversal of 316661243 is 342166613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342166613 = 3371 ⋅101503.

It is a cyclic number.

It is not a de Polignac number, because 316661243 - 2¹⁶ = 316595707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316661743) 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, 1537088 + ... + 1537293.

It is an arithmetic number, because the mean of its divisors is an integer number (79933932).

Almost surely, 2^316661243 is an apocalyptic number.

316661243 is a deficient number, since it is larger than the sum of its proper divisors (3074485).

316661243 is a wasteful number, since it uses less digits than its factorization.

316661243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074484.

The product of its digits is 15552, while the sum is 32.

The square root of 316661243 is about 17794.9780275223. The cubic root of 316661243 is about 681.6032262091.

The spelling of 316661243 in words is "three hundred sixteen million, six hundred sixty-one thousand, two hundred forty-three".