2530505561 has 4 divisors (see below), whose sum is σ = 2531074512. Its totient is φ = 2529936612.

The previous prime is 2530505503. The next prime is 2530505567. The reversal of 2530505561 is 1655050352.

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 a de Polignac number, because none of the positive numbers 2^k-2530505561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2530505567) 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, 277751 + ... + 286716.

It is an arithmetic number, because the mean of its divisors is an integer number (632768628).

Almost surely, 2^2530505561 is an apocalyptic number.

It is an amenable number.

2530505561 is a deficient number, since it is larger than the sum of its proper divisors (568951).

2530505561 is an equidigital number, since it uses as much as digits as its factorization.

2530505561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568950.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 2530505561 is about 50304.1306554442. The cubic root of 2530505561 is about 1362.7068280244.

The spelling of 2530505561 in words is "two billion, five hundred thirty million, five hundred five thousand, five hundred sixty-one".