55061869 has 2 divisors, whose sum is σ = 55061870. Its totient is φ = 55061868.

The previous prime is 55061857. The next prime is 55061899. The reversal of 55061869 is 96816055.

55061869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52388644 + 2673225 = 7238^2 + 1635^2 .

It is a cyclic number.

It is not a de Polignac number, because 55061869 - 2⁵ = 55061837 is a prime.

It is a super-2 number, since 2×55061869² = 6063618835546322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55061819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27530934 + 27530935.

It is an arithmetic number, because the mean of its divisors is an integer number (27530935).

Almost surely, 2^55061869 is an apocalyptic number.

It is an amenable number.

55061869 is a deficient number, since it is larger than the sum of its proper divisors (1).

55061869 is an equidigital number, since it uses as much as digits as its factorization.

55061869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 55061869 is about 7420.3685218458. The cubic root of 55061869 is about 380.4377895292.

The spelling of 55061869 in words is "fifty-five million, sixty-one thousand, eight hundred sixty-nine".