2491507225 has 27 divisors (see below), whose sum is σ = 3157458717. Its totient is φ = 1950278880.

The previous prime is 2491507217. The next prime is 2491507253. The reversal of 2491507225 is 5227051942.

The square root of 2491507225 is 49915.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 743598361 + 1747908864 = 27269^2 + 41808^2 .

It is not a de Polignac number, because 2491507225 - 2³ = 2491507217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 16721451 + ... + 16721599.

Almost surely, 2^2491507225 is an apocalyptic number.

2491507225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2491507225 is the 49915-th square number.

2491507225 is the 24958-th centered octagonal number.

It is an amenable number.

2491507225 is a deficient number, since it is larger than the sum of its proper divisors (665951492).

2491507225 is an frugal number, since it uses more digits than its factorization.

2491507225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The cubic root of 2491507225 is about 1355.6702021703.

The spelling of 2491507225 in words is "two billion, four hundred ninety-one million, five hundred seven thousand, two hundred twenty-five".