55551011 has 2 divisors, whose sum is σ = 55551012. Its totient is φ = 55551010.

The previous prime is 55551007. The next prime is 55551017. The reversal of 55551011 is 11015555.

It is a happy number.

55551011 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 is a cyclic number.

It is not a de Polignac number, because 55551011 - 2² = 55551007 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (55551017) 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, 27775505 + 27775506.

It is an arithmetic number, because the mean of its divisors is an integer number (27775506).

Almost surely, 2^55551011 is an apocalyptic number.

55551011 is a deficient number, since it is larger than the sum of its proper divisors (1).

55551011 is an equidigital number, since it uses as much as digits as its factorization.

55551011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 625, while the sum is 23.

The square root of 55551011 is about 7453.2550607101. The cubic root of 55551011 is about 381.5610094658.

Adding to 55551011 its reverse (11015555), we get a palindrome (66566566).

The spelling of 55551011 in words is "fifty-five million, five hundred fifty-one thousand, eleven".