2162721325 has 12 divisors (see below), whose sum is σ = 2691979488. Its totient is φ = 1723593200.

The previous prime is 2162721269. The next prime is 2162721331. The reversal of 2162721325 is 5231272612.

It is not a de Polignac number, because 2162721325 - 2¹⁷ = 2162590253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 157891 + ... + 171040.

It is an arithmetic number, because the mean of its divisors is an integer number (224331624).

Almost surely, 2^2162721325 is an apocalyptic number.

2162721325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2162721325 is a deficient number, since it is larger than the sum of its proper divisors (529258163).

2162721325 is a wasteful number, since it uses less digits than its factorization.

2162721325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329204 (or 329199 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 2162721325 is about 46505.0677346029. The cubic root of 2162721325 is about 1293.2034488829.

Adding to 2162721325 its reverse (5231272612), we get a palindrome (7393993937).

The spelling of 2162721325 in words is "two billion, one hundred sixty-two million, seven hundred twenty-one thousand, three hundred twenty-five".