55147128 has 16 divisors (see below), whose sum is σ = 137867880. Its totient is φ = 18382368.

The previous prime is 55147117. The next prime is 55147129. The reversal of 55147128 is 82174155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55147129) 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, 1148875 + ... + 1148922.

Almost surely, 2^55147128 is an apocalyptic number.

It is an amenable number.

55147128 is an abundant number, since it is smaller than the sum of its proper divisors (82720752).

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

55147128 is a wasteful number, since it uses less digits than its factorization.

55147128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297806 (or 2297802 counting only the distinct ones).

The product of its digits is 11200, while the sum is 33.

The square root of 55147128 is about 7426.1112299776. Note that the first 3 decimals coincide. The cubic root of 55147128 is about 380.6340476601.

The spelling of 55147128 in words is "fifty-five million, one hundred forty-seven thousand, one hundred twenty-eight".