2521625605 has 8 divisors (see below), whose sum is σ = 3028477464. Its totient is φ = 2015616000.

The previous prime is 2521625597. The next prime is 2521625609. The reversal of 2521625605 is 5065261252.

It can be written as a sum of positive squares in 4 ways, for example, as 36204289 + 2485421316 = 6017^2 + 49854^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2521625605 - 2³ = 2521625597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521625609) 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, 203956 + ... + 215965.

It is an arithmetic number, because the mean of its divisors is an integer number (378559683).

Almost surely, 2^2521625605 is an apocalyptic number.

It is an amenable number.

2521625605 is a deficient number, since it is larger than the sum of its proper divisors (506851859).

2521625605 is a wasteful number, since it uses less digits than its factorization.

2521625605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421127.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 2521625605 is about 50215.7903950540. The cubic root of 2521625605 is about 1361.1109731550.

Adding to 2521625605 its reverse (5065261252), we get a palindrome (7586886857).

The spelling of 2521625605 in words is "two billion, five hundred twenty-one million, six hundred twenty-five thousand, six hundred five".