55312731031 has 2 divisors, whose sum is σ = 55312731032. Its totient is φ = 55312731030.

The previous prime is 55312731029. The next prime is 55312731053. The reversal of 55312731031 is 13013721355.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55312731031 - 2¹ = 55312731029 is a prime.

It is a super-2 number, since 2×55312731031² (a number of 22 digits) contains 22 as substring.

Together with 55312731029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 55312730984 and 55312731002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55312731091) 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, 27656365515 + 27656365516.

It is an arithmetic number, because the mean of its divisors is an integer number (27656365516).

Almost surely, 2^55312731031 is an apocalyptic number.

55312731031 is a deficient number, since it is larger than the sum of its proper divisors (1).

55312731031 is an equidigital number, since it uses as much as digits as its factorization.

55312731031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 31.

The spelling of 55312731031 in words is "fifty-five billion, three hundred twelve million, seven hundred thirty-one thousand, thirty-one".