2531207442791 has 8 divisors (see below), whose sum is σ = 2540821551840. Its totient is φ = 2521603581088.

The previous prime is 2531207442697. The next prime is 2531207442823. The reversal of 2531207442791 is 1972447021352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2531207442791 - 2²² = 2531203248487 is a prime.

It is a super-2 number, since 2×2531207442791² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531207444791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2066696 + ... + 3055101.

It is an arithmetic number, because the mean of its divisors is an integer number (317602693980).

Almost surely, 2^{2531207442791} is an apocalyptic number.

2531207442791 is a deficient number, since it is larger than the sum of its proper divisors (9614109049).

2531207442791 is a wasteful number, since it uses less digits than its factorization.

2531207442791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123673.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 2531207442791 in words is "two trillion, five hundred thirty-one billion, two hundred seven million, four hundred forty-two thousand, seven hundred ninety-one".