13533425261 has 2 divisors, whose sum is σ = 13533425262. Its totient is φ = 13533425260.

The previous prime is 13533425237. The next prime is 13533425281. The reversal of 13533425261 is 16252433531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12475549636 + 1057875625 = 111694^2 + 32525^2 .

It is a cyclic number.

It is not a de Polignac number, because 13533425261 - 2¹⁰ = 13533424237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13533425221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6766712630 + 6766712631.

It is an arithmetic number, because the mean of its divisors is an integer number (6766712631).

Almost surely, 2^13533425261 is an apocalyptic number.

It is an amenable number.

13533425261 is a deficient number, since it is larger than the sum of its proper divisors (1).

13533425261 is an equidigital number, since it uses as much as digits as its factorization.

13533425261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 35.

Adding to 13533425261 its reverse (16252433531), we get a palindrome (29785858792).

The spelling of 13533425261 in words is "thirteen billion, five hundred thirty-three million, four hundred twenty-five thousand, two hundred sixty-one".