13213501 has 4 divisors (see below), whose sum is σ = 15101152. Its totient is φ = 11325852.

The previous prime is 13213481. The next prime is 13213507. The reversal of 13213501 is 10531231.

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.

It is a cyclic number.

It is not a de Polignac number, because 13213501 - 2²³ = 4824893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213507) 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, 943815 + ... + 943828.

It is an arithmetic number, because the mean of its divisors is an integer number (3775288).

Almost surely, 2^13213501 is an apocalyptic number.

It is an amenable number.

13213501 is a deficient number, since it is larger than the sum of its proper divisors (1887651).

13213501 is an equidigital number, since it uses as much as digits as its factorization.

13213501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887650.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 13213501 is about 3635.0379640383. The cubic root of 13213501 is about 236.4136967260.

Adding to 13213501 its reverse (10531231), we get a palindrome (23744732).

The spelling of 13213501 in words is "thirteen million, two hundred thirteen thousand, five hundred one".