2531551265 has 4 divisors (see below), whose sum is σ = 3037861524. Its totient is φ = 2025241008.

The previous prime is 2531551229. The next prime is 2531551303. The reversal of 2531551265 is 5621551352.

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 831803281 + 1699747984 = 28841^2 + 41228^2 .

It is a cyclic number.

It is not a de Polignac number, because 2531551265 - 2¹² = 2531547169 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 253155122 + ... + 253155131.

It is an arithmetic number, because the mean of its divisors is an integer number (759465381).

Almost surely, 2^2531551265 is an apocalyptic number.

It is an amenable number.

2531551265 is a deficient number, since it is larger than the sum of its proper divisors (506310259).

2531551265 is an equidigital number, since it uses as much as digits as its factorization.

2531551265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506310258.

The product of its digits is 45000, while the sum is 35.

The square root of 2531551265 is about 50314.5234003066. The cubic root of 2531551265 is about 1362.8945101173.

The spelling of 2531551265 in words is "two billion, five hundred thirty-one million, five hundred fifty-one thousand, two hundred sixty-five".