13457225981 has 2 divisors, whose sum is σ = 13457225982. Its totient is φ = 13457225980.

The previous prime is 13457225927. The next prime is 13457226059. The reversal of 13457225981 is 18952275431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11896264900 + 1560961081 = 109070^2 + 39509^2 .

It is a cyclic number.

It is not a de Polignac number, because 13457225981 - 2¹⁸ = 13456963837 is a prime.

It is a super-4 number, since 4×13457225981⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13457225081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6728612990 + 6728612991.

It is an arithmetic number, because the mean of its divisors is an integer number (6728612991).

Almost surely, 2^13457225981 is an apocalyptic number.

It is an amenable number.

13457225981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13457225981 is an equidigital number, since it uses as much as digits as its factorization.

13457225981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 47.

The spelling of 13457225981 in words is "thirteen billion, four hundred fifty-seven million, two hundred twenty-five thousand, nine hundred eighty-one".