55439136 has 36 divisors (see below), whose sum is σ = 157655862. Its totient is φ = 18479616.

The previous prime is 55439101. The next prime is 55439221. The reversal of 55439136 is 63193455.

It can be written as a sum of positive squares in only one way, i.e., 33872400 + 21566736 = 5820^2 + 4644^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 55439136.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95961 + ... + 96536.

Almost surely, 2^55439136 is an apocalyptic number.

It is an amenable number.

55439136 is an abundant number, since it is smaller than the sum of its proper divisors (102216726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55439136 is a wasteful number, since it uses less digits than its factorization.

55439136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192513 (or 192502 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 55439136 is about 7445.7461681151. The cubic root of 55439136 is about 381.3046935419.

The spelling of 55439136 in words is "fifty-five million, four hundred thirty-nine thousand, one hundred thirty-six".