31223533335461 has 2 divisors, whose sum is σ = 31223533335462. Its totient is φ = 31223533335460.

The previous prime is 31223533335443. The next prime is 31223533335563. The reversal of 31223533335461 is 16453333532213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16931496744100 + 14292036591361 = 4114790^2 + 3780481^2 .

It is a cyclic number.

It is not a de Polignac number, because 31223533335461 - 2¹⁰ = 31223533334437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31223533335061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611766667730 + 15611766667731.

It is an arithmetic number, because the mean of its divisors is an integer number (15611766667731).

Almost surely, 2^{31223533335461} is an apocalyptic number.

It is an amenable number.

31223533335461 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223533335461 is an equidigital number, since it uses as much as digits as its factorization.

31223533335461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1749600, while the sum is 44.

Adding to 31223533335461 its reverse (16453333532213), we get a palindrome (47676866867674).

The spelling of 31223533335461 in words is "thirty-one trillion, two hundred twenty-three billion, five hundred thirty-three million, three hundred thirty-five thousand, four hundred sixty-one".