55400554 has 16 divisors (see below), whose sum is σ = 90992736. Its totient is φ = 25088400.

The previous prime is 55400549. The next prime is 55400557. The reversal of 55400554 is 45500455.

55400554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55400557) 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 in 7 ways as a sum of consecutive naturals, for example, 1549 + ... + 10639.

It is an arithmetic number, because the mean of its divisors is an integer number (5687046).

Almost surely, 2^55400554 is an apocalyptic number.

55400554 is a deficient number, since it is larger than the sum of its proper divisors (35592182).

55400554 is a wasteful number, since it uses less digits than its factorization.

55400554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9381.

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 55400554 is about 7443.1548418665. The cubic root of 55400554 is about 381.2162186677.

Subtracting from 55400554 its reverse (45500455), we obtain a palindrome (9900099).

It can be divided in two parts, 55400 and 554, that multiplied together give a square (30691600 = 5540²).

The spelling of 55400554 in words is "fifty-five million, four hundred thousand, five hundred fifty-four".