13514225581 has 2 divisors, whose sum is σ = 13514225582. Its totient is φ = 13514225580.

The previous prime is 13514225579. The next prime is 13514225639. The reversal of 13514225581 is 18552241531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11786576356 + 1727649225 = 108566^2 + 41565^2 .

It is a cyclic number.

It is not a de Polignac number, because 13514225581 - 2¹ = 13514225579 is a prime.

It is a super-2 number, since 2×13514225581² (a number of 21 digits) contains 22 as substring.

Together with 13514225579, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13514225581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13514229581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6757112790 + 6757112791.

It is an arithmetic number, because the mean of its divisors is an integer number (6757112791).

Almost surely, 2^13514225581 is an apocalyptic number.

It is an amenable number.

13514225581 is a deficient number, since it is larger than the sum of its proper divisors (1).

13514225581 is an equidigital number, since it uses as much as digits as its factorization.

13514225581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48000, while the sum is 37.

The spelling of 13514225581 in words is "thirteen billion, five hundred fourteen million, two hundred twenty-five thousand, five hundred eighty-one".