3131140421 has 2 divisors, whose sum is σ = 3131140422. Its totient is φ = 3131140420.

The previous prime is 3131140403. The next prime is 3131140447. The reversal of 3131140421 is 1240411313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2742616900 + 388523521 = 52370^2 + 19711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131140421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3131140393 and 3131140402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131140921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565570210 + 1565570211.

It is an arithmetic number, because the mean of its divisors is an integer number (1565570211).

Almost surely, 2^3131140421 is an apocalyptic number.

It is an amenable number.

3131140421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131140421 is an equidigital number, since it uses as much as digits as its factorization.

3131140421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 3131140421 is about 55956.5940796972. The cubic root of 3131140421 is about 1462.9658265895.

Adding to 3131140421 its reverse (1240411313), we get a palindrome (4371551734).

The spelling of 3131140421 in words is "three billion, one hundred thirty-one million, one hundred forty thousand, four hundred twenty-one".