55211000 has 128 divisors (see below), whose sum is σ = 144668160. Its totient is φ = 19584000.

The previous prime is 55210997. The next prime is 55211003. The reversal of 55211000 is 11255.

It is an interprime number because it is at equal distance from previous prime (55210997) and next prime (55211003).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55211003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402932 + ... + 403068.

It is an arithmetic number, because the mean of its divisors is an integer number (1130220).

Almost surely, 2^55211000 is an apocalyptic number.

55211000 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 55211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72334080).

55211000 is an abundant number, since it is smaller than the sum of its proper divisors (89457160).

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

55211000 is a wasteful number, since it uses less digits than its factorization.

55211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 55211000 is about 7430.4104866420. The cubic root of 55211000 is about 380.7809424530.

Adding to 55211000 its reverse (11255), we get a palindrome (55222255).

The spelling of 55211000 in words is "fifty-five million, two hundred eleven thousand".