13055621 has 4 divisors (see below), whose sum is σ = 13087200. Its totient is φ = 13024044.

The previous prime is 13055599. The next prime is 13055629. The reversal of 13055621 is 12655031.

13055621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12655031 = 523 ⋅24197.

It is a cyclic number.

It is not a de Polignac number, because 13055621 - 2¹⁰ = 13054597 is a prime.

It is a super-3 number, since 3×13055621³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13055629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15161 + ... + 15998.

It is an arithmetic number, because the mean of its divisors is an integer number (3271800).

Almost surely, 2^13055621 is an apocalyptic number.

It is an amenable number.

13055621 is a deficient number, since it is larger than the sum of its proper divisors (31579).

13055621 is an equidigital number, since it uses as much as digits as its factorization.

13055621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31578.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 13055621 is about 3613.2562876165. The cubic root of 13055621 is about 235.4683341769.

The spelling of 13055621 in words is "thirteen million, fifty-five thousand, six hundred twenty-one".