55083280 has 160 divisors (see below), whose sum is σ = 159989760. Its totient is φ = 17210880.

The previous prime is 55083277. The next prime is 55083283. The reversal of 55083280 is 8238055.

55083280 = T₂₇₁ + T₂₇₂ + ... + T₇₀₄.

It is an interprime number because it is at equal distance from previous prime (55083277) and next prime (55083283).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (55083283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329757 + ... + 329923.

It is an arithmetic number, because the mean of its divisors is an integer number (999936).

Almost surely, 2^55083280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55083280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79994880).

55083280 is an abundant number, since it is smaller than the sum of its proper divisors (104906480).

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

55083280 is a wasteful number, since it uses less digits than its factorization.

55083280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 55083280 is about 7421.8110997249. The cubic root of 55083280 is about 380.4870946599.

The spelling of 55083280 in words is "fifty-five million, eighty-three thousand, two hundred eighty".