315203078081 has 2 divisors, whose sum is σ = 315203078082. Its totient is φ = 315203078080.

The previous prime is 315203078041. The next prime is 315203078119. The reversal of 315203078081 is 180870302513.

It is a happy number.

It is an a-pointer prime, because the next prime (315203078119) can be obtained adding 315203078081 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291806316481 + 23396761600 = 540191^2 + 152960^2 .

It is a cyclic number.

It is not a de Polignac number, because 315203078081 - 2¹⁸ = 315202815937 is a prime.

It is a super-2 number, since 2×315203078081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315203078041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157601539040 + 157601539041.

It is an arithmetic number, because the mean of its divisors is an integer number (157601539041).

Almost surely, 2^315203078081 is an apocalyptic number.

It is an amenable number.

315203078081 is a deficient number, since it is larger than the sum of its proper divisors (1).

315203078081 is an equidigital number, since it uses as much as digits as its factorization.

315203078081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 315203078081 in words is "three hundred fifteen billion, two hundred three million, seventy-eight thousand, eighty-one".