2154241421 has 8 divisors (see below), whose sum is σ = 2173954464. Its totient is φ = 2134578160.

The previous prime is 2154241403. The next prime is 2154241457. The reversal of 2154241421 is 1241424512.

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

It is a cyclic number.

It is not a de Polignac number, because 2154241421 - 2⁶ = 2154241357 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 (2154241471) 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, 77435 + ... + 101511.

It is an arithmetic number, because the mean of its divisors is an integer number (271744308).

Almost surely, 2^2154241421 is an apocalyptic number.

It is an amenable number.

2154241421 is a deficient number, since it is larger than the sum of its proper divisors (19713043).

2154241421 is a wasteful number, since it uses less digits than its factorization.

2154241421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24891.

The product of its digits is 2560, while the sum is 26.

The square root of 2154241421 is about 46413.8063619006. The cubic root of 2154241421 is about 1291.5110432797.

Adding to 2154241421 its reverse (1241424512), we get a palindrome (3395665933).

The spelling of 2154241421 in words is "two billion, one hundred fifty-four million, two hundred forty-one thousand, four hundred twenty-one".