55275040 has 48 divisors (see below), whose sum is σ = 134131032. Its totient is φ = 21510144.

The previous prime is 55275013. The next prime is 55275061. The reversal of 55275040 is 4057255.

It can be written as a sum of positive squares in 4 ways, for example, as 55175184 + 99856 = 7428^2 + 316^2 .

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, 1252 + ... + 10588.

Almost surely, 2^55275040 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 55275040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67065516).

55275040 is an abundant number, since it is smaller than the sum of its proper divisors (78855992).

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

55275040 is a wasteful number, since it uses less digits than its factorization.

55275040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9389 (or 9381 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 55275040 is about 7434.7185555339. The cubic root of 55275040 is about 380.9281099219.

The spelling of 55275040 in words is "fifty-five million, two hundred seventy-five thousand, forty".