55776551 has 2 divisors, whose sum is σ = 55776552. Its totient is φ = 55776550.

The previous prime is 55776529. The next prime is 55776563. The reversal of 55776551 is 15567755.

55776551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55776551 - 2¹⁰ = 55775527 is a prime.

It is a super-2 number, since 2×55776551² = 6222047282911202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55776499 and 55776508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55776521) 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, 27888275 + 27888276.

It is an arithmetic number, because the mean of its divisors is an integer number (27888276).

Almost surely, 2^55776551 is an apocalyptic number.

55776551 is a deficient number, since it is larger than the sum of its proper divisors (1).

55776551 is an equidigital number, since it uses as much as digits as its factorization.

55776551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183750, while the sum is 41.

The square root of 55776551 is about 7468.3700363600. The cubic root of 55776551 is about 382.0766980485.

The spelling of 55776551 in words is "fifty-five million, seven hundred seventy-six thousand, five hundred fifty-one".