55226250 has 60 divisors (see below), whose sum is σ = 149553690. Its totient is φ = 14724000.

The previous prime is 55226219. The next prime is 55226257. The reversal of 55226250 is 5262255.

55226250 is a `hidden beast` number, since 552 + 2 + 62 + 50 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 10830681 + 44395569 = 3291^2 + 6663^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55226257) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 8796 + ... + 13704.

Almost surely, 2^55226250 is an apocalyptic number.

55226250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55226250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74776845).

55226250 is an abundant number, since it is smaller than the sum of its proper divisors (94327440).

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

55226250 is a wasteful number, since it uses less digits than its factorization.

55226250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4937 (or 4919 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 55226250 is about 7431.4366040490. The cubic root of 55226250 is about 380.8159981171.

The spelling of 55226250 in words is "fifty-five million, two hundred twenty-six thousand, two hundred fifty".