5215621000 has 64 divisors (see below), whose sum is σ = 12625470000. Its totient is φ = 2014297600.

The previous prime is 5215620989. The next prime is 5215621003. The reversal of 5215621000 is 1265125.

It can be written as a sum of positive squares in 8 ways, for example, as 181476 + 5215439524 = 426^2 + 72218^2 .

It is not an unprimeable number, because it can be changed into a prime (5215621003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60925 + ... + 118924.

Almost surely, 2^5215621000 is an apocalyptic number.

5215621000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5215621000 is an abundant number, since it is smaller than the sum of its proper divisors (7409849000).

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

5215621000 is a wasteful number, since it uses less digits than its factorization.

5215621000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179899 (or 179885 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 5215621000 is about 72219.2564348318. The cubic root of 5215621000 is about 1734.2112868223.

Adding to 5215621000 its reverse (1265125), we get a palindrome (5216886125).

The spelling of 5215621000 in words is "five billion, two hundred fifteen million, six hundred twenty-one thousand".