2521043261 has 4 divisors (see below), whose sum is σ = 2750229024. Its totient is φ = 2291857500.

The previous prime is 2521043257. The next prime is 2521043267. The reversal of 2521043261 is 1623401252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2521043261 - 2² = 2521043257 is a prime.

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 2521043261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521043267) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 114592865 + ... + 114592886.

It is an arithmetic number, because the mean of its divisors is an integer number (687557256).

Almost surely, 2^2521043261 is an apocalyptic number.

It is an amenable number.

2521043261 is a deficient number, since it is larger than the sum of its proper divisors (229185763).

2521043261 is a wasteful number, since it uses less digits than its factorization.

2521043261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229185762.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2521043261 is about 50209.9916450899. The cubic root of 2521043261 is about 1361.0061868045.

The spelling of 2521043261 in words is "two billion, five hundred twenty-one million, forty-three thousand, two hundred sixty-one".