2500015625 has 14 divisors (see below), whose sum is σ = 3124999062. Its totient is φ = 2000000000.

The previous prime is 2500015601. The next prime is 2500015627. The reversal of 2500015625 is 5265100052.

It can be written as a sum of positive squares in 7 ways, for example, as 2194360336 + 305655289 = 46844^2 + 17483^2 .

It is not a de Polignac number, because 2500015625 - 2⁸ = 2500015369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2500015594 and 2500015603.

It is not an unprimeable number, because it can be changed into a prime (2500015627) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 64376 + ... + 95625.

Almost surely, 2^2500015625 is an apocalyptic number.

2500015625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2500015625 is a deficient number, since it is larger than the sum of its proper divisors (624983437).

2500015625 is an frugal number, since it uses more digits than its factorization.

2500015625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160031 (or 160006 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2500015625 is about 50000.1562497559. The cubic root of 2500015625 is about 1357.2116358099.

Adding to 2500015625 its reverse (5265100052), we get a palindrome (7765115677).

The spelling of 2500015625 in words is "two billion, five hundred million, fifteen thousand, six hundred twenty-five".