55280278 has 8 divisors (see below), whose sum is σ = 83654568. Its totient is φ = 27395424.

The previous prime is 55280273. The next prime is 55280279. The reversal of 55280278 is 87208255.

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 (55280273) 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, 122076 + ... + 122527.

It is an arithmetic number, because the mean of its divisors is an integer number (10456821).

Almost surely, 2^55280278 is an apocalyptic number.

55280278 is a deficient number, since it is larger than the sum of its proper divisors (28374290).

55280278 is a wasteful number, since it uses less digits than its factorization.

55280278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244718.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 55280278 is about 7435.0708133817. The cubic root of 55280278 is about 380.9401421063.

The spelling of 55280278 in words is "fifty-five million, two hundred eighty thousand, two hundred seventy-eight".