13131281 has 2 divisors, whose sum is σ = 13131282. Its totient is φ = 13131280.

The previous prime is 13131271. The next prime is 13131317. The reversal of 13131281 is 18213131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12845056 + 286225 = 3584^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 13131281 - 2¹⁴ = 13114897 is a prime.

It is a super-2 number, since 2×13131281² = 344861081401922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13131241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6565640 + 6565641.

It is an arithmetic number, because the mean of its divisors is an integer number (6565641).

Almost surely, 2^13131281 is an apocalyptic number.

It is an amenable number.

13131281 is a deficient number, since it is larger than the sum of its proper divisors (1).

13131281 is an equidigital number, since it uses as much as digits as its factorization.

13131281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 20.

The square root of 13131281 is about 3623.7109432183. The cubic root of 13131281 is about 235.9223207433.

The spelling of 13131281 in words is "thirteen million, one hundred thirty-one thousand, two hundred eighty-one".