2521320500 has 24 divisors (see below), whose sum is σ = 5506565064. Its totient is φ = 1008528000.

The previous prime is 2521320493. The next prime is 2521320509. The reversal of 2521320500 is 50231252.

It can be written as a sum of positive squares in 4 ways, for example, as 45859984 + 2475460516 = 6772^2 + 49754^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521320509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2520821 + ... + 2521820.

It is an arithmetic number, because the mean of its divisors is an integer number (229440211).

Almost surely, 2^2521320500 is an apocalyptic number.

2521320500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2521320500 is an abundant number, since it is smaller than the sum of its proper divisors (2985244564).

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

2521320500 is a wasteful number, since it uses less digits than its factorization.

2521320500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042660 (or 5042648 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2521320500 is about 50212.7523643148. The cubic root of 2521320500 is about 1361.0560749030.

Adding to 2521320500 its reverse (50231252), we get a palindrome (2571551752).

The spelling of 2521320500 in words is "two billion, five hundred twenty-one million, three hundred twenty thousand, five hundred".