5221521000 has 96 divisors (see below), whose sum is σ = 17648771400. Its totient is φ = 1392403200.

The previous prime is 5221520999. The next prime is 5221521029. The reversal of 5221521000 is 1251225.

It can be written as a sum of positive squares in 4 ways, for example, as 762753924 + 4458767076 = 27618^2 + 66774^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281085 + ... + 299084.

Almost surely, 2^5221521000 is an apocalyptic number.

5221521000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5221521000 is an abundant number, since it is smaller than the sum of its proper divisors (12427250400).

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

5221521000 is a wasteful number, since it uses less digits than its factorization.

5221521000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580196 (or 580179 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 5221521000 is about 72260.0927206712. The cubic root of 5221521000 is about 1734.8649635924.

Adding to 5221521000 its reverse (1251225), we get a palindrome (5222772225).

The spelling of 5221521000 in words is "five billion, two hundred twenty-one million, five hundred twenty-one thousand".