2505554257 has 4 divisors (see below), whose sum is σ = 2505715300. Its totient is φ = 2505393216.

The previous prime is 2505554201. The next prime is 2505554269. The reversal of 2505554257 is 7524555052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1302921216 + 1202633041 = 36096^2 + 34679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2505554257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2505554957) 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 3 ways as a sum of consecutive naturals, for example, 54348 + ... + 89245.

It is an arithmetic number, because the mean of its divisors is an integer number (626428825).

Almost surely, 2^2505554257 is an apocalyptic number.

It is an amenable number.

2505554257 is a deficient number, since it is larger than the sum of its proper divisors (161043).

2505554257 is a wasteful number, since it uses less digits than its factorization.

2505554257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161042.

The product of its (nonzero) digits is 350000, while the sum is 40.

The square root of 2505554257 is about 50055.5117544512. The cubic root of 2505554257 is about 1358.2131697366.

The spelling of 2505554257 in words is "two billion, five hundred five million, five hundred fifty-four thousand, two hundred fifty-seven".