3131440242461 has 2 divisors, whose sum is σ = 3131440242462. Its totient is φ = 3131440242460.

The previous prime is 3131440242391. The next prime is 3131440242487. The reversal of 3131440242461 is 1642420441313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2583795841561 + 547644400900 = 1607419^2 + 740030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131440242461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131440242661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565720121230 + 1565720121231.

It is an arithmetic number, because the mean of its divisors is an integer number (1565720121231).

Almost surely, 2^{3131440242461} is an apocalyptic number.

It is an amenable number.

3131440242461 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131440242461 is an equidigital number, since it uses as much as digits as its factorization.

3131440242461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 3131440242461 its reverse (1642420441313), we get a palindrome (4773860683774).

The spelling of 3131440242461 in words is "three trillion, one hundred thirty-one billion, four hundred forty million, two hundred forty-two thousand, four hundred sixty-one".