13225511381 has 2 divisors, whose sum is σ = 13225511382. Its totient is φ = 13225511380.

The previous prime is 13225511353. The next prime is 13225511399. The reversal of 13225511381 is 18311552231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12812202481 + 413308900 = 113191^2 + 20330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13225511381 is a prime.

It is a super-2 number, since 2×13225511381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13225591381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6612755690 + 6612755691.

It is an arithmetic number, because the mean of its divisors is an integer number (6612755691).

Almost surely, 2^13225511381 is an apocalyptic number.

It is an amenable number.

13225511381 is a deficient number, since it is larger than the sum of its proper divisors (1).

13225511381 is an equidigital number, since it uses as much as digits as its factorization.

13225511381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 32.

The spelling of 13225511381 in words is "thirteen billion, two hundred twenty-five million, five hundred eleven thousand, three hundred eighty-one".