2031256531 has 2 divisors, whose sum is σ = 2031256532. Its totient is φ = 2031256530.

The previous prime is 2031256519. The next prime is 2031256573. The reversal of 2031256531 is 1356521302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2031256531 - 2⁵ = 2031256499 is a prime.

It is a super-2 number, since 2×2031256531² = 8252006189460307922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2031256531.

It is not a weakly prime, because it can be changed into another prime (2031256631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015628265 + 1015628266.

It is an arithmetic number, because the mean of its divisors is an integer number (1015628266).

Almost surely, 2^2031256531 is an apocalyptic number.

2031256531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031256531 is an equidigital number, since it uses as much as digits as its factorization.

2031256531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2031256531 is about 45069.4633981813. The cubic root of 2031256531 is about 1266.4506120956.

Adding to 2031256531 its reverse (1356521302), we get a palindrome (3387777833).

The spelling of 2031256531 in words is "two billion, thirty-one million, two hundred fifty-six thousand, five hundred thirty-one".