315257351253181 has 2 divisors, whose sum is σ = 315257351253182. Its totient is φ = 315257351253180.

The previous prime is 315257351253139. The next prime is 315257351253197. The reversal of 315257351253181 is 181352153752513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292766130368100 + 22491220885081 = 17110410^2 + 4742491^2 .

It is an emirp because it is prime and its reverse (181352153752513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315257351253181 - 2¹⁹ = 315257350728893 is a prime.

It is a super-2 number, since 2×315257351253181² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315257351253281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157628675626590 + 157628675626591.

It is an arithmetic number, because the mean of its divisors is an integer number (157628675626591).

Almost surely, 2^{315257351253181} is an apocalyptic number.

It is an amenable number.

315257351253181 is a deficient number, since it is larger than the sum of its proper divisors (1).

315257351253181 is an equidigital number, since it uses as much as digits as its factorization.

315257351253181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780000, while the sum is 52.

The spelling of 315257351253181 in words is "three hundred fifteen trillion, two hundred fifty-seven billion, three hundred fifty-one million, two hundred fifty-three thousand, one hundred eighty-one".