2505288921 has 8 divisors (see below), whose sum is σ = 3342319680. Its totient is φ = 1669225392.

The previous prime is 2505288911. The next prime is 2505288923. The reversal of 2505288921 is 1298825052.

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

It is a de Polignac number, because none of the positive numbers 2^k-2505288921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2505288923) by changing a digit.

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, 235741 + ... + 246138.

It is an arithmetic number, because the mean of its divisors is an integer number (417789960).

Almost surely, 2^2505288921 is an apocalyptic number.

It is an amenable number.

2505288921 is a deficient number, since it is larger than the sum of its proper divisors (837030759).

2505288921 is a wasteful number, since it uses less digits than its factorization.

2505288921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483615.

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 2505288921 is about 50052.8612668647. The cubic root of 2505288921 is about 1358.1652235159.

The spelling of 2505288921 in words is "two billion, five hundred five million, two hundred eighty-eight thousand, nine hundred twenty-one".