31520555453 has 2 divisors, whose sum is σ = 31520555454. Its totient is φ = 31520555452.

The previous prime is 31520555431. The next prime is 31520555501. The reversal of 31520555453 is 35455502513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28398316324 + 3122239129 = 168518^2 + 55877^2 .

It is a cyclic number.

It is not a de Polignac number, because 31520555453 - 2⁸ = 31520555197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31520551453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15760277726 + 15760277727.

It is an arithmetic number, because the mean of its divisors is an integer number (15760277727).

Almost surely, 2^31520555453 is an apocalyptic number.

It is an amenable number.

31520555453 is a deficient number, since it is larger than the sum of its proper divisors (1).

31520555453 is an equidigital number, since it uses as much as digits as its factorization.

31520555453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225000, while the sum is 38.

The spelling of 31520555453 in words is "thirty-one billion, five hundred twenty million, five hundred fifty-five thousand, four hundred fifty-three".