2631164521 has 2 divisors, whose sum is σ = 2631164522. Its totient is φ = 2631164520.

The previous prime is 2631164513. The next prime is 2631164533. The reversal of 2631164521 is 1254611362.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2360890921 + 270273600 = 48589^2 + 16440^2 .

It is a cyclic number.

It is not a de Polignac number, because 2631164521 - 2³ = 2631164513 is a prime.

It is not a weakly prime, because it can be changed into another prime (2631164021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1315582260 + 1315582261.

It is an arithmetic number, because the mean of its divisors is an integer number (1315582261).

Almost surely, 2^2631164521 is an apocalyptic number.

It is an amenable number.

2631164521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2631164521 is an equidigital number, since it uses as much as digits as its factorization.

2631164521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 2631164521 is about 51294.8781166307. The cubic root of 2631164521 is about 1380.5410818413.

Adding to 2631164521 its reverse (1254611362), we get a palindrome (3885775883).

The spelling of 2631164521 in words is "two billion, six hundred thirty-one million, one hundred sixty-four thousand, five hundred twenty-one".