13425404521 has 2 divisors, whose sum is σ = 13425404522. Its totient is φ = 13425404520.

The previous prime is 13425404483. The next prime is 13425404537. The reversal of 13425404521 is 12540452431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13417978896 + 7425625 = 115836^2 + 2725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13425404521 is a prime.

It is not a weakly prime, because it can be changed into another prime (13425404561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6712702260 + 6712702261.

It is an arithmetic number, because the mean of its divisors is an integer number (6712702261).

Almost surely, 2^13425404521 is an apocalyptic number.

It is an amenable number.

13425404521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13425404521 is an equidigital number, since it uses as much as digits as its factorization.

13425404521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 13425404521 its reverse (12540452431), we get a palindrome (25965856952).

The spelling of 13425404521 in words is "thirteen billion, four hundred twenty-five million, four hundred four thousand, five hundred twenty-one".