2521661252 has 24 divisors (see below), whose sum is σ = 4817957760. Its totient is φ = 1145286560.

The previous prime is 2521661237. The next prime is 2521661287.

2521661252 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33749 + ... + 78627.

It is an arithmetic number, because the mean of its divisors is an integer number (200748240).

Almost surely, 2^2521661252 is an apocalyptic number.

2521661252 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2521661252 is a deficient number, since it is larger than the sum of its proper divisors (2296296508).

2521661252 is a wasteful number, since it uses less digits than its factorization.

2521661252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46171 (or 46169 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 2521661252 is about 50216.1453319547. The cubic root of 2521661252 is about 1361.1173869137.

It can be divided in two parts, 25216 and 61252, that added together give a palindrome (86468).

The spelling of 2521661252 in words is "two billion, five hundred twenty-one million, six hundred sixty-one thousand, two hundred fifty-two".