2021521032 has 24 divisors (see below), whose sum is σ = 5474952990. Its totient is φ = 673840320.

The previous prime is 2021521027. The next prime is 2021521039. The reversal of 2021521032 is 2301251202.

It can be written as a sum of positive squares in only one way, i.e., 1161037476 + 860483556 = 34074^2 + 29334^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2021520996 and 2021521014.

It is not an unprimeable number, because it can be changed into a prime (2021521039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14038269 + ... + 14038412.

Almost surely, 2^2021521032 is an apocalyptic number.

It is an amenable number.

2021521032 is an abundant number, since it is smaller than the sum of its proper divisors (3453431958).

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

2021521032 is a wasteful number, since it uses less digits than its factorization.

2021521032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28076693 (or 28076686 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2021521032 is about 44961.3281832288. The cubic root of 2021521032 is about 1264.4240702418.

Adding to 2021521032 its reverse (2301251202), we get a palindrome (4322772234).

The spelling of 2021521032 in words is "two billion, twenty-one million, five hundred twenty-one thousand, thirty-two".