55400055 has 8 divisors (see below), whose sum is σ = 88640112. Its totient is φ = 29546688.

The previous prime is 55400053. The next prime is 55400083. The reversal of 55400055 is 55000455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55400055 - 2¹ = 55400053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55399998 and 55400034.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55400053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1846654 + ... + 1846683.

It is an arithmetic number, because the mean of its divisors is an integer number (11080014).

Almost surely, 2^55400055 is an apocalyptic number.

55400055 is a deficient number, since it is larger than the sum of its proper divisors (33240057).

55400055 is a wasteful number, since it uses less digits than its factorization.

55400055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3693345.

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 55400055 is about 7443.1213210588. The cubic root of 55400055 is about 381.2150741095.

The spelling of 55400055 in words is "fifty-five million, four hundred thousand, fifty-five".