2530505257 has 4 divisors (see below), whose sum is σ = 2892006016. Its totient is φ = 2169004500.

The previous prime is 2530505213. The next prime is 2530505269. The reversal of 2530505257 is 7525050352.

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 2530505257 - 2¹⁹ = 2529980969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2530535257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180750369 + ... + 180750382.

It is an arithmetic number, because the mean of its divisors is an integer number (723001504).

Almost surely, 2^2530505257 is an apocalyptic number.

It is an amenable number.

2530505257 is a deficient number, since it is larger than the sum of its proper divisors (361500759).

2530505257 is an equidigital number, since it uses as much as digits as its factorization.

2530505257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361500758.

The product of its (nonzero) digits is 52500, while the sum is 34.

The square root of 2530505257 is about 50304.1276338234. The cubic root of 2530505257 is about 1362.7067734553.

The spelling of 2530505257 in words is "two billion, five hundred thirty million, five hundred five thousand, two hundred fifty-seven".