5202121520 has 20 divisors (see below), whose sum is σ = 12094932720. Its totient is φ = 2080848576.

The previous prime is 5202121517. The next prime is 5202121537. The reversal of 5202121520 is 251212025.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×5202121520² = 54124136617694220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 5202121492 and 5202121501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32513180 + ... + 32513339.

It is an arithmetic number, because the mean of its divisors is an integer number (604746636).

Almost surely, 2^5202121520 is an apocalyptic number.

It is an amenable number.

5202121520 is an abundant number, since it is smaller than the sum of its proper divisors (6892811200).

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

5202121520 is a wasteful number, since it uses less digits than its factorization.

5202121520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65026532 (or 65026526 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 5202121520 is about 72125.7341037164. The cubic root of 5202121520 is about 1732.7137867997.

Adding to 5202121520 its reverse (251212025), we get a palindrome (5453333545).

The spelling of 5202121520 in words is "five billion, two hundred two million, one hundred twenty-one thousand, five hundred twenty".