55255278 has 32 divisors (see below), whose sum is σ = 119482272. Its totient is φ = 16934400.

The previous prime is 55255273. The next prime is 55255283. The reversal of 55255278 is 87255255.

55255278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55255273) and next prime (55255283).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55255271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20658 + ... + 23178.

It is an arithmetic number, because the mean of its divisors is an integer number (3733821).

Almost surely, 2^55255278 is an apocalyptic number.

55255278 is an abundant number, since it is smaller than the sum of its proper divisors (64226994).

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

55255278 is a wasteful number, since it uses less digits than its factorization.

55255278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820.

The product of its digits is 140000, while the sum is 39.

The square root of 55255278 is about 7433.3894018812. The cubic root of 55255278 is about 380.8827078826.

The spelling of 55255278 in words is "fifty-five million, two hundred fifty-five thousand, two hundred seventy-eight".