2511211525 has 12 divisors (see below), whose sum is σ = 3297073572. Its totient is φ = 1890794240.

The previous prime is 2511211519. The next prime is 2511211531. The reversal of 2511211525 is 5251121152.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2511211519) and next prime (2511211531).

It can be written as a sum of positive squares in 6 ways, for example, as 147112641 + 2364098884 = 12129^2 + 48622^2 .

It is not a de Polignac number, because 2511211525 - 2¹³ = 2511203333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2511211525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2953942 + ... + 2954791.

It is an arithmetic number, because the mean of its divisors is an integer number (274756131).

Almost surely, 2^2511211525 is an apocalyptic number.

2511211525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2511211525 is a deficient number, since it is larger than the sum of its proper divisors (785862047).

2511211525 is a wasteful number, since it uses less digits than its factorization.

2511211525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908760 (or 5908755 counting only the distinct ones).

The product of its digits is 1000, while the sum is 25.

The square root of 2511211525 is about 50111.9898327736. The cubic root of 2511211525 is about 1359.2346336943.

Adding to 2511211525 its reverse (5251121152), we get a palindrome (7762332677).

The spelling of 2511211525 in words is "two billion, five hundred eleven million, two hundred eleven thousand, five hundred twenty-five".