13232257921 has 8 divisors (see below), whose sum is σ = 14240309544. Its totient is φ = 12249726720.

The previous prime is 13232257873. The next prime is 13232257931. The reversal of 13232257921 is 12975223231.

It can be written as a sum of positive squares in 4 ways, for example, as 3053667600 + 10178590321 = 55260^2 + 100889^2 .

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

It is not a de Polignac number, because 13232257921 - 2²³ = 13223869313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13232257931) 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, 6379030 + ... + 6381103.

It is an arithmetic number, because the mean of its divisors is an integer number (1780038693).

Almost surely, 2^13232257921 is an apocalyptic number.

It is an amenable number.

13232257921 is a deficient number, since it is larger than the sum of its proper divisors (1008051623).

13232257921 is a wasteful number, since it uses less digits than its factorization.

13232257921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12760211.

The product of its digits is 45360, while the sum is 37.

The spelling of 13232257921 in words is "thirteen billion, two hundred thirty-two million, two hundred fifty-seven thousand, nine hundred twenty-one".