2131308523 has 2 divisors, whose sum is σ = 2131308524. Its totient is φ = 2131308522.

The previous prime is 2131308493. The next prime is 2131308533. The reversal of 2131308523 is 3258031312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2131308523 - 2¹³ = 2131300331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131308491 and 2131308500.

It is not a weakly prime, because it can be changed into another prime (2131308533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065654261 + 1065654262.

It is an arithmetic number, because the mean of its divisors is an integer number (1065654262).

Almost surely, 2^2131308523 is an apocalyptic number.

2131308523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131308523 is an equidigital number, since it uses as much as digits as its factorization.

2131308523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2131308523 is about 46166.0971168237. The cubic root of 2131308523 is about 1286.9117728692.

Adding to 2131308523 its reverse (3258031312), we get a palindrome (5389339835).

It can be divided in two parts, 213 and 1308523, that added together give a square (1308736 = 1144²).

The spelling of 2131308523 in words is "two billion, one hundred thirty-one million, three hundred eight thousand, five hundred twenty-three".