55272500 has 30 divisors (see below), whose sum is σ = 120875370. Its totient is φ = 22108000.

The previous prime is 55272499. The next prime is 55272523. The reversal of 55272500 is 527255.

It can be written as a sum of positive squares in 5 ways, for example, as 33500944 + 21771556 = 5788^2 + 4666^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55272500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8555 + ... + 13554.

It is an arithmetic number, because the mean of its divisors is an integer number (4029179).

Almost surely, 2^55272500 is an apocalyptic number.

55272500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55272500 is an abundant number, since it is smaller than the sum of its proper divisors (65602870).

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

55272500 is a wasteful number, since it uses less digits than its factorization.

55272500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22133 (or 22116 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 55272500 is about 7434.5477333863. The cubic root of 55272500 is about 380.9222750266.

Adding to 55272500 its reverse (527255), we get a palindrome (55799755).

The spelling of 55272500 in words is "fifty-five million, two hundred seventy-two thousand, five hundred".