3131401243 has 2 divisors, whose sum is σ = 3131401244. Its totient is φ = 3131401242.

The previous prime is 3131401219. The next prime is 3131401249. The reversal of 3131401243 is 3421041313.

3131401243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3131401243 - 2²¹ = 3129304091 is a prime.

It is not a weakly prime, because it can be changed into another prime (3131401249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565700621 + 1565700622.

It is an arithmetic number, because the mean of its divisors is an integer number (1565700622).

Almost surely, 2^3131401243 is an apocalyptic number.

3131401243 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131401243 is an equidigital number, since it uses as much as digits as its factorization.

3131401243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 3131401243 is about 55958.9246054640. The cubic root of 3131401243 is about 1463.0064468350.

Adding to 3131401243 its reverse (3421041313), we get a palindrome (6552442556).

The spelling of 3131401243 in words is "three billion, one hundred thirty-one million, four hundred one thousand, two hundred forty-three".