55522378 has 4 divisors (see below), whose sum is σ = 83283570. Its totient is φ = 27761188.

The previous prime is 55522373. The next prime is 55522381. The reversal of 55522378 is 87322555.

55522378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87322555 = 5 ⋅17464511.

It can be written as a sum of positive squares in only one way, i.e., 48902049 + 6620329 = 6993^2 + 2573^2 .

It is not an unprimeable number, because it can be changed into a prime (55522373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13880593 + ... + 13880596.

Almost surely, 2^55522378 is an apocalyptic number.

55522378 is a deficient number, since it is larger than the sum of its proper divisors (27761192).

55522378 is a wasteful number, since it uses less digits than its factorization.

55522378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27761191.

The product of its digits is 84000, while the sum is 37.

The square root of 55522378 is about 7451.3339745310. Note that the first 3 decimals coincide. The cubic root of 55522378 is about 381.4954414181.

The spelling of 55522378 in words is "fifty-five million, five hundred twenty-two thousand, three hundred seventy-eight".