55275450 has 96 divisors (see below), whose sum is σ = 144365760. Its totient is φ = 13977600.

The previous prime is 55275439. The next prime is 55275457. The reversal of 55275450 is 5457255.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55275457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 421885 + ... + 422015.

It is an arithmetic number, because the mean of its divisors is an integer number (1503810).

Almost surely, 2^55275450 is an apocalyptic number.

55275450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55275450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72182880).

55275450 is an abundant number, since it is smaller than the sum of its proper divisors (89090310).

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

55275450 is a wasteful number, since it uses less digits than its factorization.

55275450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 35000, while the sum is 33.

The square root of 55275450 is about 7434.7461288197. The cubic root of 55275450 is about 380.9290517584.

The spelling of 55275450 in words is "fifty-five million, two hundred seventy-five thousand, four hundred fifty".