2316521243 has 2 divisors, whose sum is σ = 2316521244. Its totient is φ = 2316521242.

The previous prime is 2316521239. The next prime is 2316521257. The reversal of 2316521243 is 3421256132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2316521243 - 2² = 2316521239 is a prime.

It is not a weakly prime, because it can be changed into another prime (2316521203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1158260621 + 1158260622.

It is an arithmetic number, because the mean of its divisors is an integer number (1158260622).

Almost surely, 2^2316521243 is an apocalyptic number.

2316521243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2316521243 is an equidigital number, since it uses as much as digits as its factorization.

2316521243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

The square root of 2316521243 is about 48130.2528873473. The cubic root of 2316521243 is about 1323.1591844396.

Adding to 2316521243 its reverse (3421256132), we get a palindrome (5737777375).

The spelling of 2316521243 in words is "two billion, three hundred sixteen million, five hundred twenty-one thousand, two hundred forty-three".