55405250 has 16 divisors (see below), whose sum is σ = 103719096. Its totient is φ = 22162000.

The previous prime is 55405249. The next prime is 55405279. The reversal of 55405250 is 5250455.

55405250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 17447329 + 37957921 = 4177^2 + 6161^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 110561 + ... + 111060.

Almost surely, 2^55405250 is an apocalyptic number.

55405250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55405250 is a deficient number, since it is larger than the sum of its proper divisors (48313846).

55405250 is a wasteful number, since it uses less digits than its factorization.

55405250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221638 (or 221628 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 55405250 is about 7443.4702928137. The cubic root of 55405250 is about 381.2269895635.

It can be divided in two parts, 55405 and 250, that added together give a palindrome (55655).

The spelling of 55405250 in words is "fifty-five million, four hundred five thousand, two hundred fifty".