2531721250 has 20 divisors (see below), whose sum is σ = 4745460654. Its totient is φ = 1012688000.

The previous prime is 2531721221. The next prime is 2531721287. The reversal of 2531721250 is 521271352.

It can be written as a sum of positive squares in 5 ways, for example, as 104878081 + 2426843169 = 10241^2 + 49263^2 .

It is a super-2 number, since 2×2531721250² = 12819224975403125000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1011439 + ... + 1013938.

Almost surely, 2^2531721250 is an apocalyptic number.

2531721250 is a deficient number, since it is larger than the sum of its proper divisors (2213739404).

2531721250 is an equidigital number, since it uses as much as digits as its factorization.

2531721250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025399 (or 2025384 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 2531721250 is about 50316.2125959417. The cubic root of 2531721250 is about 1362.9250140013.

The spelling of 2531721250 in words is "two billion, five hundred thirty-one million, seven hundred twenty-one thousand, two hundred fifty".