55385069 has 2 divisors, whose sum is σ = 55385070. Its totient is φ = 55385068.

The previous prime is 55385063. The next prime is 55385087. The reversal of 55385069 is 96058355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47472100 + 7912969 = 6890^2 + 2813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55385069 is a prime.

It is a super-2 number, since 2×55385069² = 6135011736269522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55385063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27692534 + 27692535.

It is an arithmetic number, because the mean of its divisors is an integer number (27692535).

Almost surely, 2^55385069 is an apocalyptic number.

It is an amenable number.

55385069 is a deficient number, since it is larger than the sum of its proper divisors (1).

55385069 is an equidigital number, since it uses as much as digits as its factorization.

55385069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 55385069 is about 7442.1145516580. The cubic root of 55385069 is about 381.1806974632.

The spelling of 55385069 in words is "fifty-five million, three hundred eighty-five thousand, sixty-nine".