2021171472 has 240 divisors, whose sum is σ = 6115799040. Its totient is φ = 621831168.

The previous prime is 2021171459. The next prime is 2021171473. The reversal of 2021171472 is 2741711202.

It is a happy number.

2021171472 is a `hidden beast` number, since 2 + 0 + 21 + 171 + 472 = 666.

It is not an unprimeable number, because it can be changed into a prime (2021171473) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15914673 + ... + 15914799.

It is an arithmetic number, because the mean of its divisors is an integer number (25482496).

Almost surely, 2^2021171472 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 2021171472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3057899520).

2021171472 is an abundant number, since it is smaller than the sum of its proper divisors (4094627568).

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

2021171472 is a wasteful number, since it uses less digits than its factorization.

2021171472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 2021171472 is about 44957.4406744868. The cubic root of 2021171472 is about 1264.3511849326.

Adding to 2021171472 its reverse (2741711202), we get a palindrome (4762882674).

The spelling of 2021171472 in words is "two billion, twenty-one million, one hundred seventy-one thousand, four hundred seventy-two".