55075280 has 40 divisors (see below), whose sum is σ = 137902632. Its totient is φ = 20335104.

The previous prime is 55075249. The next prime is 55075297. The reversal of 55075280 is 8257055.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2483776 + 52591504 = 1576^2 + 7252^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25439 + ... + 27518.

Almost surely, 2^55075280 is an apocalyptic number.

It is an amenable number.

55075280 is an abundant number, since it is smaller than the sum of its proper divisors (82827352).

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

55075280 is a wasteful number, since it uses less digits than its factorization.

55075280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52983 (or 52977 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 55075280 is about 7421.2721281462. The cubic root of 55075280 is about 380.4686738001.

It can be divided in two parts, 55075 and 280, that added together give a palindrome (55355).

The spelling of 55075280 in words is "fifty-five million, seventy-five thousand, two hundred eighty".