71253310631 has 2 divisors, whose sum is σ = 71253310632. Its totient is φ = 71253310630.

The previous prime is 71253310603. The next prime is 71253310649. The reversal of 71253310631 is 13601335217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71253310631 - 2²² = 71249116327 is a prime.

It is a super-2 number, since 2×71253310631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71253360631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35626655315 + 35626655316.

It is an arithmetic number, because the mean of its divisors is an integer number (35626655316).

Almost surely, 2^71253310631 is an apocalyptic number.

71253310631 is a deficient number, since it is larger than the sum of its proper divisors (1).

71253310631 is an equidigital number, since it uses as much as digits as its factorization.

71253310631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

Adding to 71253310631 its reverse (13601335217), we get a palindrome (84854645848).

The spelling of 71253310631 in words is "seventy-one billion, two hundred fifty-three million, three hundred ten thousand, six hundred thirty-one".