55013904 has 200 divisors, whose sum is σ = 184729248. Its totient is φ = 15621120.

The previous prime is 55013897. The next prime is 55013909. The reversal of 55013904 is 40931055.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55013909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 242239 + ... + 242465.

Almost surely, 2^55013904 is an apocalyptic number.

55013904 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55013904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92364624).

55013904 is an abundant number, since it is smaller than the sum of its proper divisors (129715344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55013904 is a wasteful number, since it uses less digits than its factorization.

55013904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 55013904 is about 7417.1358353478. The cubic root of 55013904 is about 380.3272895888.

Adding to 55013904 its reverse (40931055), we get a palindrome (95944959).

The spelling of 55013904 in words is "fifty-five million, thirteen thousand, nine hundred four".