31124144461 has 2 divisors, whose sum is σ = 31124144462. Its totient is φ = 31124144460.

The previous prime is 31124144449. The next prime is 31124144483. The reversal of 31124144461 is 16444142113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25996725225 + 5127419236 = 161235^2 + 71606^2 .

It is a cyclic number.

It is not a de Polignac number, because 31124144461 - 2⁷ = 31124144333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31124174461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562072230 + 15562072231.

It is an arithmetic number, because the mean of its divisors is an integer number (15562072231).

Almost surely, 2^31124144461 is an apocalyptic number.

It is an amenable number.

31124144461 is a deficient number, since it is larger than the sum of its proper divisors (1).

31124144461 is an equidigital number, since it uses as much as digits as its factorization.

31124144461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 31.

Adding to 31124144461 its reverse (16444142113), we get a palindrome (47568286574).

The spelling of 31124144461 in words is "thirty-one billion, one hundred twenty-four million, one hundred forty-four thousand, four hundred sixty-one".