55081378 has 12 divisors (see below), whose sum is σ = 90816390. Its totient is φ = 25036880.

The previous prime is 55081357. The next prime is 55081381. The reversal of 55081378 is 87318055.

It can be written as a sum of positive squares in only one way, i.e., 46063369 + 9018009 = 6787^2 + 3003^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113563 + ... + 114046.

Almost surely, 2^55081378 is an apocalyptic number.

55081378 is a deficient number, since it is larger than the sum of its proper divisors (35735012).

55081378 is a wasteful number, since it uses less digits than its factorization.

55081378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227633 (or 227622 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 55081378 is about 7421.6829627787. The cubic root of 55081378 is about 380.4827152621.

It can be divided in two parts, 5508 and 1378, that added together give a palindrome (6886).

The spelling of 55081378 in words is "fifty-five million, eighty-one thousand, three hundred seventy-eight".