63131311 has 2 divisors, whose sum is σ = 63131312. Its totient is φ = 63131310.

The previous prime is 63131303. The next prime is 63131317. The reversal of 63131311 is 11313136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63131311 - 2³ = 63131303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63131317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31565655 + 31565656.

It is an arithmetic number, because the mean of its divisors is an integer number (31565656).

Almost surely, 2^63131311 is an apocalyptic number.

63131311 is a deficient number, since it is larger than the sum of its proper divisors (1).

63131311 is an equidigital number, since it uses as much as digits as its factorization.

63131311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 19.

The square root of 63131311 is about 7945.5214429262. The cubic root of 63131311 is about 398.1819807839.

Adding to 63131311 its reverse (11313136), we get a palindrome (74444447).

The spelling of 63131311 in words is "sixty-three million, one hundred thirty-one thousand, three hundred eleven".