315242233 has 2 divisors, whose sum is σ = 315242234. Its totient is φ = 315242232.

The previous prime is 315242227. The next prime is 315242287. The reversal of 315242233 is 332242513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247212729 + 68029504 = 15723^2 + 8248^2 .

It is an emirp because it is prime and its reverse (332242513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315242233 - 2²¹ = 313145081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 315242198 and 315242207.

It is not a weakly prime, because it can be changed into another prime (315242293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157621116 + 157621117.

It is an arithmetic number, because the mean of its divisors is an integer number (157621117).

Almost surely, 2^315242233 is an apocalyptic number.

It is an amenable number.

315242233 is a deficient number, since it is larger than the sum of its proper divisors (1).

315242233 is an equidigital number, since it uses as much as digits as its factorization.

315242233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 25.

The square root of 315242233 is about 17755.0621795588. The cubic root of 315242233 is about 680.5835770289.

Adding to 315242233 its reverse (332242513), we get a palindrome (647484746).

The spelling of 315242233 in words is "three hundred fifteen million, two hundred forty-two thousand, two hundred thirty-three".