631308312541 has 2 divisors, whose sum is σ = 631308312542. Its totient is φ = 631308312540.

The previous prime is 631308312527. The next prime is 631308312571. The reversal of 631308312541 is 145213803136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358567428025 + 272740884516 = 598805^2 + 522246^2 .

It is a cyclic number.

It is not a de Polignac number, because 631308312541 - 2¹³ = 631308304349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 631308312541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631308312521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315654156270 + 315654156271.

It is an arithmetic number, because the mean of its divisors is an integer number (315654156271).

Almost surely, 2^631308312541 is an apocalyptic number.

It is an amenable number.

631308312541 is a deficient number, since it is larger than the sum of its proper divisors (1).

631308312541 is an equidigital number, since it uses as much as digits as its factorization.

631308312541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 631308312541 in words is "six hundred thirty-one billion, three hundred eight million, three hundred twelve thousand, five hundred forty-one".