21231554353413 has 8 divisors (see below), whose sum is σ = 29798672776800. Its totient is φ = 13409402749488.

The previous prime is 21231554353381. The next prime is 21231554353417. The reversal of 21231554353413 is 31435345513212.

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

It is not a de Polignac number, because 21231554353413 - 2⁵ = 21231554353381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231554353417) 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, 186241704798 + ... + 186241704911.

It is an arithmetic number, because the mean of its divisors is an integer number (3724834097100).

Almost surely, 2^{21231554353413} is an apocalyptic number.

It is an amenable number.

21231554353413 is a deficient number, since it is larger than the sum of its proper divisors (8567118423387).

21231554353413 is a wasteful number, since it uses less digits than its factorization.

21231554353413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372483409731.

The product of its digits is 648000, while the sum is 42.

Adding to 21231554353413 its reverse (31435345513212), we get a palindrome (52666899866625).

The spelling of 21231554353413 in words is "twenty-one trillion, two hundred thirty-one billion, five hundred fifty-four million, three hundred fifty-three thousand, four hundred thirteen".