2151321332 has 24 divisors (see below), whose sum is σ = 3862345032. Its totient is φ = 1047872000.

The previous prime is 2151321323. The next prime is 2151321397. The reversal of 2151321332 is 2331231512.

It can be written as a sum of positive squares in 4 ways, for example, as 441168016 + 1710153316 = 21004^2 + 41354^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2151321298 and 2151321307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105608 + ... + 124320.

It is an arithmetic number, because the mean of its divisors is an integer number (160931043).

Almost surely, 2^2151321332 is an apocalyptic number.

It is an amenable number.

2151321332 is a deficient number, since it is larger than the sum of its proper divisors (1711023700).

2151321332 is a wasteful number, since it uses less digits than its factorization.

2151321332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19459 (or 19457 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 2151321332 is about 46382.3385783856. The cubic root of 2151321332 is about 1290.9272287239.

Adding to 2151321332 its reverse (2331231512), we get a palindrome (4482552844).

The spelling of 2151321332 in words is "two billion, one hundred fifty-one million, three hundred twenty-one thousand, three hundred thirty-two".