55802250 has 128 divisors (see below), whose sum is σ = 177016320. Its totient is φ = 12744000.

The previous prime is 55802239. The next prime is 55802267. The reversal of 55802250 is 5220855.

It is a super-2 number, since 2×55802250² = 6227782210125000, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46660 + ... + 47840.

It is an arithmetic number, because the mean of its divisors is an integer number (1382940).

Almost surely, 2^55802250 is an apocalyptic number.

55802250 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 55802250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88508160).

55802250 is an abundant number, since it is smaller than the sum of its proper divisors (121214070).

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

55802250 is a wasteful number, since it uses less digits than its factorization.

55802250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 55802250 is about 7470.0903608993. The cubic root of 55802250 is about 382.1353695466.

The spelling of 55802250 in words is "fifty-five million, eight hundred two thousand, two hundred fifty".