31555535115151 has 2 divisors, whose sum is σ = 31555535115152. Its totient is φ = 31555535115150.

The previous prime is 31555535115127. The next prime is 31555535115187. The reversal of 31555535115151 is 15151153555513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31555535115151 - 2¹³ = 31555535106959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31555535115451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15777767557575 + 15777767557576.

It is an arithmetic number, because the mean of its divisors is an integer number (15777767557576).

Almost surely, 2^{31555535115151} is an apocalyptic number.

31555535115151 is a deficient number, since it is larger than the sum of its proper divisors (1).

31555535115151 is an equidigital number, since it uses as much as digits as its factorization.

31555535115151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 703125, while the sum is 46.

The spelling of 31555535115151 in words is "thirty-one trillion, five hundred fifty-five billion, five hundred thirty-five million, one hundred fifteen thousand, one hundred fifty-one".