2531606005 has 4 divisors (see below), whose sum is σ = 3037927212. Its totient is φ = 2025284800.

The previous prime is 2531605931. The next prime is 2531606023. The reversal of 2531606005 is 5006061352.

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 298287441 + 2233318564 = 17271^2 + 47258^2 .

It is not a de Polignac number, because 2531606005 - 2¹³ = 2531597813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253160596 + ... + 253160605.

It is an arithmetic number, because the mean of its divisors is an integer number (759481803).

Almost surely, 2^2531606005 is an apocalyptic number.

It is an amenable number.

2531606005 is a deficient number, since it is larger than the sum of its proper divisors (506321207).

2531606005 is an equidigital number, since it uses as much as digits as its factorization.

2531606005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506321206.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 2531606005 is about 50315.0673754890. The cubic root of 2531606005 is about 1362.9043333837.

Adding to 2531606005 its reverse (5006061352), we get a palindrome (7537667357).

The spelling of 2531606005 in words is "two billion, five hundred thirty-one million, six hundred six thousand, five".