13531225291 has 2 divisors, whose sum is σ = 13531225292. Its totient is φ = 13531225290.

The previous prime is 13531225273. The next prime is 13531225303. The reversal of 13531225291 is 19252213531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13531225291 - 2¹¹ = 13531223243 is a prime.

It is not a weakly prime, because it can be changed into another prime (13531222291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765612645 + 6765612646.

It is an arithmetic number, because the mean of its divisors is an integer number (6765612646).

Almost surely, 2^13531225291 is an apocalyptic number.

13531225291 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531225291 is an equidigital number, since it uses as much as digits as its factorization.

13531225291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 34.

The spelling of 13531225291 in words is "thirteen billion, five hundred thirty-one million, two hundred twenty-five thousand, two hundred ninety-one".