55455772 has 12 divisors (see below), whose sum is σ = 100394280. Its totient is φ = 26771696.

The previous prime is 55455731. The next prime is 55455779. The reversal of 55455772 is 27755455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55455779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238918 + ... + 239149.

It is an arithmetic number, because the mean of its divisors is an integer number (8366190).

Almost surely, 2^55455772 is an apocalyptic number.

It is an amenable number.

55455772 is a deficient number, since it is larger than the sum of its proper divisors (44938508).

55455772 is a wasteful number, since it uses less digits than its factorization.

55455772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478100 (or 478098 counting only the distinct ones).

The product of its digits is 245000, while the sum is 40.

The square root of 55455772 is about 7446.8632322609. The cubic root of 55455772 is about 381.3428299617.

The spelling of 55455772 in words is "fifty-five million, four hundred fifty-five thousand, seven hundred seventy-two".