55033400 has 24 divisors (see below), whose sum is σ = 127953120. Its totient is φ = 22013280.

The previous prime is 55033397. The next prime is 55033409. The reversal of 55033400 is 433055.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55033409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 137384 + ... + 137783.

It is an arithmetic number, because the mean of its divisors is an integer number (5331380).

Almost surely, 2^55033400 is an apocalyptic number.

55033400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55033400 is an abundant number, since it is smaller than the sum of its proper divisors (72919720).

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

55033400 is a wasteful number, since it uses less digits than its factorization.

55033400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275183 (or 275174 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 55033400 is about 7418.4499728717. The cubic root of 55033400 is about 380.3722114757.

Adding to 55033400 its reverse (433055), we get a palindrome (55466455).

The spelling of 55033400 in words is "fifty-five million, thirty-three thousand, four hundred".