2151123324 has 72 divisors (see below), whose sum is σ = 5863576320. Its totient is φ = 611995104.

The previous prime is 2151123319. The next prime is 2151123383. The reversal of 2151123324 is 4233211512.

It is a junction number, because it is equal to n+sod(n) for n = 2151123294 and 2151123303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132879 + ... + 148185.

It is an arithmetic number, because the mean of its divisors is an integer number (81438560).

Almost surely, 2^2151123324 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 2151123324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2931788160).

2151123324 is an abundant number, since it is smaller than the sum of its proper divisors (3712452996).

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

2151123324 is a wasteful number, since it uses less digits than its factorization.

2151123324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15567 (or 15558 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 2151123324 is about 46380.2040099006. The cubic root of 2151123324 is about 1290.8876217844.

Adding to 2151123324 its reverse (4233211512), we get a palindrome (6384334836).

The spelling of 2151123324 in words is "two billion, one hundred fifty-one million, one hundred twenty-three thousand, three hundred twenty-four".