55306921597237 has 2 divisors, whose sum is σ = 55306921597238. Its totient is φ = 55306921597236.

The previous prime is 55306921597171. The next prime is 55306921597243. The reversal of 55306921597237 is 73279512960355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54117194760721 + 1189726836516 = 7356439^2 + 1090746^2 .

It is a cyclic number.

It is not a de Polignac number, because 55306921597237 - 2²³ = 55306913208629 is a prime.

It is a super-2 number, since 2×55306921597237² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55306921591237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27653460798618 + 27653460798619.

It is an arithmetic number, because the mean of its divisors is an integer number (27653460798619).

Almost surely, 2^{55306921597237} is an apocalyptic number.

It is an amenable number.

55306921597237 is a deficient number, since it is larger than the sum of its proper divisors (1).

55306921597237 is an equidigital number, since it uses as much as digits as its factorization.

55306921597237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107163000, while the sum is 64.

The spelling of 55306921597237 in words is "fifty-five trillion, three hundred six billion, nine hundred twenty-one million, five hundred ninety-seven thousand, two hundred thirty-seven".