55236278 has 4 divisors (see below), whose sum is σ = 82854420. Its totient is φ = 27618138.

The previous prime is 55236263. The next prime is 55236283. The reversal of 55236278 is 87263255.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13809068 + ... + 13809071.

It is an arithmetic number, because the mean of its divisors is an integer number (20713605).

Almost surely, 2^55236278 is an apocalyptic number.

55236278 is a deficient number, since it is larger than the sum of its proper divisors (27618142).

55236278 is a wasteful number, since it uses less digits than its factorization.

55236278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27618141.

The product of its digits is 100800, while the sum is 38.

The square root of 55236278 is about 7432.1112747321. Note that the first 3 decimals coincide. The cubic root of 55236278 is about 380.8390462854.

The spelling of 55236278 in words is "fifty-five million, two hundred thirty-six thousand, two hundred seventy-eight".