13210431257 has 2 divisors, whose sum is σ = 13210431258. Its totient is φ = 13210431256.

The previous prime is 13210431209. The next prime is 13210431301. The reversal of 13210431257 is 75213401231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12175136281 + 1035294976 = 110341^2 + 32176^2 .

It is a cyclic number.

It is not a de Polignac number, because 13210431257 - 2⁶ = 13210431193 is a prime.

It is not a weakly prime, because it can be changed into another prime (13210431557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605215628 + 6605215629.

It is an arithmetic number, because the mean of its divisors is an integer number (6605215629).

Almost surely, 2^13210431257 is an apocalyptic number.

It is an amenable number.

13210431257 is a deficient number, since it is larger than the sum of its proper divisors (1).

13210431257 is an equidigital number, since it uses as much as digits as its factorization.

13210431257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 13210431257 its reverse (75213401231), we get a palindrome (88423832488).

It can be divided in two parts, 132104 and 31257, that added together give a palindrome (163361).

The spelling of 13210431257 in words is "thirteen billion, two hundred ten million, four hundred thirty-one thousand, two hundred fifty-seven".