2631397217 has 2 divisors, whose sum is σ = 2631397218. Its totient is φ = 2631397216.

The previous prime is 2631397189. The next prime is 2631397253. The reversal of 2631397217 is 7127931362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1593526561 + 1037870656 = 39919^2 + 32216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2631397217 is a prime.

It is a super-5 number, since 5×2631397217⁵ (a number of 48 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (2631393217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1315698608 + 1315698609.

It is an arithmetic number, because the mean of its divisors is an integer number (1315698609).

Almost surely, 2^2631397217 is an apocalyptic number.

It is an amenable number.

2631397217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2631397217 is an equidigital number, since it uses as much as digits as its factorization.

2631397217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 41.

The square root of 2631397217 is about 51297.1462851492. The cubic root of 2631397217 is about 1380.5817782598.

The spelling of 2631397217 in words is "two billion, six hundred thirty-one million, three hundred ninety-seven thousand, two hundred seventeen".