13255215421 has 8 divisors (see below), whose sum is σ = 15184975680. Its totient is φ = 11334494688.

The previous prime is 13255215419. The next prime is 13255215443. The reversal of 13255215421 is 12451255231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13255215421 - 2¹ = 13255215419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13255255421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2256736 + ... + 2262601.

It is an arithmetic number, because the mean of its divisors is an integer number (1898121960).

Almost surely, 2^13255215421 is an apocalyptic number.

It is an amenable number.

13255215421 is a deficient number, since it is larger than the sum of its proper divisors (1929760259).

13255215421 is an equidigital number, since it uses as much as digits as its factorization.

13255215421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4519763.

The product of its digits is 12000, while the sum is 31.

The spelling of 13255215421 in words is "thirteen billion, two hundred fifty-five million, two hundred fifteen thousand, four hundred twenty-one".