13071631 has 2 divisors, whose sum is σ = 13071632. Its totient is φ = 13071630.

The previous prime is 13071559. The next prime is 13071649. The reversal of 13071631 is 13617031.

It is a strong prime.

It is an emirp because it is prime and its reverse (13617031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13071631 - 2⁷ = 13071503 is a prime.

It is a super-2 number, since 2×13071631² = 341735074000322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13071671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6535815 + 6535816.

It is an arithmetic number, because the mean of its divisors is an integer number (6535816).

Almost surely, 2^13071631 is an apocalyptic number.

13071631 is a deficient number, since it is larger than the sum of its proper divisors (1).

13071631 is an equidigital number, since it uses as much as digits as its factorization.

13071631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 13071631 is about 3615.4710619780. The cubic root of 13071631 is about 235.5645458164.

Adding to 13071631 its reverse (13617031), we get a palindrome (26688662).

The spelling of 13071631 in words is "thirteen million, seventy-one thousand, six hundred thirty-one".