55030278 has 8 divisors (see below), whose sum is σ = 110060568. Its totient is φ = 18343424.

The previous prime is 55030259. The next prime is 55030291. The reversal of 55030278 is 87203055.

It is a happy number.

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

55030278 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4585851 + ... + 4585862.

It is an arithmetic number, because the mean of its divisors is an integer number (13757571).

Almost surely, 2^55030278 is an apocalyptic number.

55030278 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55030278 is a wasteful number, since it uses less digits than its factorization.

55030278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9171718.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 55030278 is about 7418.2395485722. The cubic root of 55030278 is about 380.3650186043.

The spelling of 55030278 in words is "fifty-five million, thirty thousand, two hundred seventy-eight".