31555544554133 has 2 divisors, whose sum is σ = 31555544554134. Its totient is φ = 31555544554132.

The previous prime is 31555544554117. The next prime is 31555544554153. The reversal of 31555544554133 is 33145544555513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21574380701329 + 9981163852804 = 4644823^2 + 3159298^2 .

It is a cyclic number.

It is not a de Polignac number, because 31555544554133 - 2⁴ = 31555544554117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31555544554153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15777772277066 + 15777772277067.

It is an arithmetic number, because the mean of its divisors is an integer number (15777772277067).

Almost surely, 2^{31555544554133} is an apocalyptic number.

It is an amenable number.

31555544554133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31555544554133 is an equidigital number, since it uses as much as digits as its factorization.

31555544554133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000000, while the sum is 53.

The spelling of 31555544554133 in words is "thirty-one trillion, five hundred fifty-five billion, five hundred forty-four million, five hundred fifty-four thousand, one hundred thirty-three".