2154003454421 has 8 divisors (see below), whose sum is σ = 2651081174784. Its totient is φ = 1704266469360.

The previous prime is 2154003454399. The next prime is 2154003454429. The reversal of 2154003454421 is 1244543004512.

It is a happy number.

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

It is not a de Polignac number, because 2154003454421 - 2¹⁰ = 2154003453397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154003454429) 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, 11835183725 + ... + 11835183906.

It is an arithmetic number, because the mean of its divisors is an integer number (331385146848).

Almost surely, 2^{2154003454421} is an apocalyptic number.

It is an amenable number.

2154003454421 is a deficient number, since it is larger than the sum of its proper divisors (497077720363).

2154003454421 is a wasteful number, since it uses less digits than its factorization.

2154003454421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23670367651.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 2154003454421 its reverse (1244543004512), we get a palindrome (3398546458933).

The spelling of 2154003454421 in words is "two trillion, one hundred fifty-four billion, three million, four hundred fifty-four thousand, four hundred twenty-one".