55477305 has 80 divisors (see below), whose sum is σ = 110137104. Its totient is φ = 26542080.

The previous prime is 55477297. The next prime is 55477309. The reversal of 55477305 is 50377455.

55477305 is a `hidden beast` number, since 554 + 77 + 30 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2595321 + 52881984 = 1611^2 + 7272^2 .

It is not a de Polignac number, because 55477305 - 2³ = 55477297 is a prime.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 55477305.

It is not an unprimeable number, because it can be changed into a prime (55477309) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 215737 + ... + 215993.

Almost surely, 2^55477305 is an apocalyptic number.

It is an amenable number.

55477305 is a deficient number, since it is larger than the sum of its proper divisors (54659799).

55477305 is a wasteful number, since it uses less digits than its factorization.

55477305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 36.

The square root of 55477305 is about 7448.3088684614. The cubic root of 55477305 is about 381.3921809566.

The spelling of 55477305 in words is "fifty-five million, four hundred seventy-seven thousand, three hundred five".