2162021625 has 40 divisors (see below), whose sum is σ = 4030667784. Its totient is φ = 1153072800.

The previous prime is 2162021621. The next prime is 2162021669. The reversal of 2162021625 is 5261202612.

2162021625 is a `hidden beast` number, since 2 + 1 + 620 + 2 + 16 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 143496441 + 2018525184 = 11979^2 + 44928^2 .

It is not a de Polignac number, because 2162021625 - 2² = 2162021621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2162021621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 96642 + ... + 116891.

Almost surely, 2^2162021625 is an apocalyptic number.

2162021625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2162021625 is a deficient number, since it is larger than the sum of its proper divisors (1868646159).

2162021625 is an equidigital number, since it uses as much as digits as its factorization.

2162021625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213560 (or 213541 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 2162021625 is about 46497.5442899945. The cubic root of 2162021625 is about 1293.0639715121.

The spelling of 2162021625 in words is "two billion, one hundred sixty-two million, twenty-one thousand, six hundred twenty-five".