55257278 has 8 divisors (see below), whose sum is σ = 83233440. Its totient is φ = 27512800.

The previous prime is 55257271. The next prime is 55257287. The reversal of 55257278 is 87275255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55257271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57323 + ... + 58278.

It is an arithmetic number, because the mean of its divisors is an integer number (10404180).

Almost surely, 2^55257278 is an apocalyptic number.

55257278 is a deficient number, since it is larger than the sum of its proper divisors (27976162).

55257278 is a wasteful number, since it uses less digits than its factorization.

55257278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115842.

The product of its digits is 196000, while the sum is 41.

The square root of 55257278 is about 7433.5239287972. The cubic root of 55257278 is about 380.8873032580.

The spelling of 55257278 in words is "fifty-five million, two hundred fifty-seven thousand, two hundred seventy-eight".