2515221625 has 64 divisors (see below), whose sum is σ = 3698472960. Its totient is φ = 1672209600.

The previous prime is 2515221619. The next prime is 2515221637. The reversal of 2515221625 is 5261225152.

It is a happy number.

It is not a de Polignac number, because 2515221625 - 2³ = 2515221617 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4284582 + ... + 4285168.

It is an arithmetic number, because the mean of its divisors is an integer number (57788640).

Almost surely, 2^2515221625 is an apocalyptic number.

2515221625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2515221625 is a deficient number, since it is larger than the sum of its proper divisors (1183251335).

2515221625 is an equidigital number, since it uses as much as digits as its factorization.

2515221625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 741 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 2515221625 is about 50151.9852548232. The cubic root of 2515221625 is about 1359.9577598256.

Adding to 2515221625 its reverse (5261225152), we get a palindrome (7776446777).

The spelling of 2515221625 in words is "two billion, five hundred fifteen million, two hundred twenty-one thousand, six hundred twenty-five".