54775551 has 4 divisors (see below), whose sum is σ = 73034072. Its totient is φ = 36517032.

The previous prime is 54775531. The next prime is 54775561. The reversal of 54775551 is 15557745.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 54775551 - 2¹¹ = 54773503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54775531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9129256 + ... + 9129261.

It is an arithmetic number, because the mean of its divisors is an integer number (18258518).

Almost surely, 2^54775551 is an apocalyptic number.

54775551 is a deficient number, since it is larger than the sum of its proper divisors (18258521).

54775551 is a wasteful number, since it uses less digits than its factorization.

54775551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18258520.

The product of its digits is 122500, while the sum is 39.

The square root of 54775551 is about 7401.0506686551. The cubic root of 54775551 is about 379.7772263042. Note that the first 3 decimals are identical.

The spelling of 54775551 in words is "fifty-four million, seven hundred seventy-five thousand, five hundred fifty-one".