55045900 has 144 divisors (see below), whose sum is σ = 153990144. Its totient is φ = 16600320.

The previous prime is 55045873. The next prime is 55045919. The reversal of 55045900 is 954055.

It is a super-2 number, since 2×55045900² = 6060102213620000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209169 + ... + 209431.

It is an arithmetic number, because the mean of its divisors is an integer number (1069376).

Almost surely, 2^55045900 is an apocalyptic number.

55045900 is a gapful number since it is divisible by the number (50) 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 55045900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76995072).

55045900 is an abundant number, since it is smaller than the sum of its proper divisors (98944244).

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

55045900 is a wasteful number, since it uses less digits than its factorization.

55045900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 55045900 is about 7419.2924190923. The cubic root of 55045900 is about 380.4010078836.

Adding to 55045900 its reverse (954055), we get a palindrome (55999955).

It can be divided in two parts, 55045 and 900, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 55045900 in words is "fifty-five million, forty-five thousand, nine hundred".