4532513021 has 4 divisors (see below), whose sum is σ = 4799131452. Its totient is φ = 4265894592.

The previous prime is 4532513003. The next prime is 4532513039. The reversal of 4532513021 is 1203152354.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1203152354 = 2 ⋅601576177.

It is an interprime number because it is at equal distance from previous prime (4532513003) and next prime (4532513039).

It can be written as a sum of positive squares in 2 ways, for example, as 4208116900 + 324396121 = 64870^2 + 18011^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4532513021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4532512021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133309190 + ... + 133309223.

It is an arithmetic number, because the mean of its divisors is an integer number (1199782863).

Almost surely, 2^4532513021 is an apocalyptic number.

It is an amenable number.

4532513021 is a deficient number, since it is larger than the sum of its proper divisors (266618431).

4532513021 is a wasteful number, since it uses less digits than its factorization.

4532513021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266618430.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 4532513021 is about 67323.9409200026. The cubic root of 4532513021 is about 1654.9302211341.

Adding to 4532513021 its reverse (1203152354), we get a palindrome (5735665375).

The spelling of 4532513021 in words is "four billion, five hundred thirty-two million, five hundred thirteen thousand, twenty-one".