2154021324 has 192 divisors, whose sum is σ = 6397440000. Its totient is φ = 549027072.

The previous prime is 2154021319. The next prime is 2154021349. The reversal of 2154021324 is 4231204512.

It is a junction number, because it is equal to n+sod(n) for n = 2154021294 and 2154021303.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4316427 + ... + 4316925.

It is an arithmetic number, because the mean of its divisors is an integer number (33320000).

Almost surely, 2^2154021324 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154021324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3198720000).

2154021324 is an abundant number, since it is smaller than the sum of its proper divisors (4243418676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154021324 is a wasteful number, since it uses less digits than its factorization.

2154021324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2154021324 is about 46411.4352719241. The cubic root of 2154021324 is about 1291.4670575895.

Adding to 2154021324 its reverse (4231204512), we get a palindrome (6385225836).

The spelling of 2154021324 in words is "two billion, one hundred fifty-four million, twenty-one thousand, three hundred twenty-four".