2151165324 has 96 divisors (see below), whose sum is σ = 6289920000. Its totient is φ = 555888960.

The previous prime is 2151165323. The next prime is 2151165371. The reversal of 2151165324 is 4235611512.

It is a junction number, because it is equal to n+sod(n) for n = 2151165291 and 2151165300.

It is not an unprimeable number, because it can be changed into a prime (2151165323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178027 + ... + 189725.

It is an arithmetic number, because the mean of its divisors is an integer number (65520000).

Almost surely, 2^2151165324 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 2151165324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3144960000).

2151165324 is an abundant number, since it is smaller than the sum of its proper divisors (4138754676).

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

2151165324 is a wasteful number, since it uses less digits than its factorization.

2151165324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11923 (or 11921 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 2151165324 is about 46380.6567870702. The cubic root of 2151165324 is about 1290.8960231201.

Adding to 2151165324 its reverse (4235611512), we get a palindrome (6386776836).

The spelling of 2151165324 in words is "two billion, one hundred fifty-one million, one hundred sixty-five thousand, three hundred twenty-four".