31554341445509 has 2 divisors, whose sum is σ = 31554341445510. Its totient is φ = 31554341445508.

The previous prime is 31554341445467. The next prime is 31554341445527. The reversal of 31554341445509 is 90554414345513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15786691723009 + 15767649722500 = 3973247^2 + 3970850^2 .

It is a cyclic number.

It is not a de Polignac number, because 31554341445509 - 2¹⁶ = 31554341379973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31554341445559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15777170722754 + 15777170722755.

It is an arithmetic number, because the mean of its divisors is an integer number (15777170722755).

Almost surely, 2^{31554341445509} is an apocalyptic number.

It is an amenable number.

31554341445509 is a deficient number, since it is larger than the sum of its proper divisors (1).

31554341445509 is an equidigital number, since it uses as much as digits as its factorization.

31554341445509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960000, while the sum is 53.

The spelling of 31554341445509 in words is "thirty-one trillion, five hundred fifty-four billion, three hundred forty-one million, four hundred forty-five thousand, five hundred nine".