215461630431263 has 2 divisors, whose sum is σ = 215461630431264. Its totient is φ = 215461630431262.

The previous prime is 215461630431253. The next prime is 215461630431301. The reversal of 215461630431263 is 362134036164512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215461630431263 - 2¹² = 215461630427167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215461630431253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107730815215631 + 107730815215632.

It is an arithmetic number, because the mean of its divisors is an integer number (107730815215632).

Almost surely, 2^{215461630431263} is an apocalyptic number.

215461630431263 is a deficient number, since it is larger than the sum of its proper divisors (1).

215461630431263 is an equidigital number, since it uses as much as digits as its factorization.

215461630431263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 47.

Adding to 215461630431263 its reverse (362134036164512), we get a palindrome (577595666595775).

The spelling of 215461630431263 in words is "two hundred fifteen trillion, four hundred sixty-one billion, six hundred thirty million, four hundred thirty-one thousand, two hundred sixty-three".