5173534021 has 4 divisors (see below), whose sum is σ = 5188886092. Its totient is φ = 5158181952.

The previous prime is 5173534019. The next prime is 5173534039. The reversal of 5173534021 is 1204353715.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1056900100 + 4116633921 = 32510^2 + 64161^2 .

It is a cyclic number.

It is not a de Polignac number, because 5173534021 - 2¹ = 5173534019 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 (5173534321) 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, 7675530 + ... + 7676203.

It is an arithmetic number, because the mean of its divisors is an integer number (1297221523).

Almost surely, 2^5173534021 is an apocalyptic number.

It is an amenable number.

5173534021 is a deficient number, since it is larger than the sum of its proper divisors (15352071).

5173534021 is a wasteful number, since it uses less digits than its factorization.

5173534021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15352070.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 5173534021 is about 71927.2828695760. The cubic root of 5173534021 is about 1729.5339964632.

Adding to 5173534021 its reverse (1204353715), we get a palindrome (6377887736).

The spelling of 5173534021 in words is "five billion, one hundred seventy-three million, five hundred thirty-four thousand, twenty-one".