55500278 has 4 divisors (see below), whose sum is σ = 83250420. Its totient is φ = 27750138.

The previous prime is 55500239. The next prime is 55500283. The reversal of 55500278 is 87200555.

It is a happy number.

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, 13875068 + ... + 13875071.

It is an arithmetic number, because the mean of its divisors is an integer number (20812605).

Almost surely, 2^55500278 is an apocalyptic number.

55500278 is a deficient number, since it is larger than the sum of its proper divisors (27750142).

55500278 is a wasteful number, since it uses less digits than its factorization.

55500278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27750141.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 55500278 is about 7449.8508709906. The cubic root of 55500278 is about 381.4448181774. Note that the first 3 decimals are identical.

The spelling of 55500278 in words is "fifty-five million, five hundred thousand, two hundred seventy-eight".