21225335523454 has 8 divisors (see below), whose sum is σ = 31838297690160. Its totient is φ = 10612569626736.

The previous prime is 21225335523439. The next prime is 21225335523473. The reversal of 21225335523454 is 45432553352212.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48796839 + ... + 49229890.

It is an arithmetic number, because the mean of its divisors is an integer number (3979787211270).

Almost surely, 2^{21225335523454} is an apocalyptic number.

21225335523454 is a deficient number, since it is larger than the sum of its proper divisors (10612962166706).

21225335523454 is a wasteful number, since it uses less digits than its factorization.

21225335523454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98134994.

The product of its digits is 4320000, while the sum is 46.

Adding to 21225335523454 its reverse (45432553352212), we get a palindrome (66657888875666).

The spelling of 21225335523454 in words is "twenty-one trillion, two hundred twenty-five billion, three hundred thirty-five million, five hundred twenty-three thousand, four hundred fifty-four".