65555050031 has 2 divisors, whose sum is σ = 65555050032. Its totient is φ = 65555050030.

The previous prime is 65555050009. The next prime is 65555050069. The reversal of 65555050031 is 13005055556.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65555050031 is a prime.

It is a super-2 number, since 2×65555050031² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 65555049973 and 65555050000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65555050081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32777525015 + 32777525016.

It is an arithmetic number, because the mean of its divisors is an integer number (32777525016).

Almost surely, 2^65555050031 is an apocalyptic number.

65555050031 is a deficient number, since it is larger than the sum of its proper divisors (1).

65555050031 is an equidigital number, since it uses as much as digits as its factorization.

65555050031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56250, while the sum is 35.

The spelling of 65555050031 in words is "sixty-five billion, five hundred fifty-five million, fifty thousand, thirty-one".