315642312049 has 2 divisors, whose sum is σ = 315642312050. Its totient is φ = 315642312048.

The previous prime is 315642312001. The next prime is 315642312103. The reversal of 315642312049 is 940213246513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 276248001649 + 39394310400 = 525593^2 + 198480^2 .

It is an emirp because it is prime and its reverse (940213246513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315642312049 - 2¹⁹ = 315641787761 is a prime.

It is not a weakly prime, because it can be changed into another prime (315642316049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157821156024 + 157821156025.

It is an arithmetic number, because the mean of its divisors is an integer number (157821156025).

Almost surely, 2^315642312049 is an apocalyptic number.

It is an amenable number.

315642312049 is a deficient number, since it is larger than the sum of its proper divisors (1).

315642312049 is an equidigital number, since it uses as much as digits as its factorization.

315642312049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 315642312049 in words is "three hundred fifteen billion, six hundred forty-two million, three hundred twelve thousand, forty-nine".