55142804 has 12 divisors (see below), whose sum is σ = 99827700. Its totient is φ = 26620608.

The previous prime is 55142779. The next prime is 55142819. The reversal of 55142804 is 40824155.

It can be written as a sum of positive squares in 2 ways, for example, as 44890000 + 10252804 = 6700^2 + 3202^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237569 + ... + 237800.

It is an arithmetic number, because the mean of its divisors is an integer number (8318975).

Almost surely, 2^55142804 is an apocalyptic number.

It is an amenable number.

55142804 is a deficient number, since it is larger than the sum of its proper divisors (44684896).

55142804 is a wasteful number, since it uses less digits than its factorization.

55142804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475402 (or 475400 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 55142804 is about 7425.8200893908. The cubic root of 55142804 is about 380.6240990934.

Adding to 55142804 its reverse (40824155), we get a palindrome (95966959).

The spelling of 55142804 in words is "fifty-five million, one hundred forty-two thousand, eight hundred four".