55980101 has 2 divisors, whose sum is σ = 55980102. Its totient is φ = 55980100.

The previous prime is 55980083. The next prime is 55980103. The reversal of 55980101 is 10108955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51984100 + 3996001 = 7210^2 + 1999^2 .

It is a cyclic number.

It is not a de Polignac number, because 55980101 - 2⁶ = 55980037 is a prime.

Together with 55980103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55980103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27990050 + 27990051.

It is an arithmetic number, because the mean of its divisors is an integer number (27990051).

Almost surely, 2^55980101 is an apocalyptic number.

It is an amenable number.

55980101 is a deficient number, since it is larger than the sum of its proper divisors (1).

55980101 is an equidigital number, since it uses as much as digits as its factorization.

55980101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 55980101 is about 7481.9850975527. The cubic root of 55980101 is about 382.5409152126.

The spelling of 55980101 in words is "fifty-five million, nine hundred eighty thousand, one hundred one".