55161272 has 8 divisors (see below), whose sum is σ = 103427400. Its totient is φ = 27580632.

The previous prime is 55161257. The next prime is 55161329. The reversal of 55161272 is 27216155.

55161272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3447572 + ... + 3447587.

It is an arithmetic number, because the mean of its divisors is an integer number (12928425).

Almost surely, 2^55161272 is an apocalyptic number.

It is an amenable number.

55161272 is a deficient number, since it is larger than the sum of its proper divisors (48266128).

55161272 is a wasteful number, since it uses less digits than its factorization.

55161272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6895165 (or 6895161 counting only the distinct ones).

The product of its digits is 4200, while the sum is 29.

The square root of 55161272 is about 7427.0634843120. The cubic root of 55161272 is about 380.6665862405. Note that the first 3 decimals are identical.

The spelling of 55161272 in words is "fifty-five million, one hundred sixty-one thousand, two hundred seventy-two".