422550 has 48 divisors (see below), whose sum is σ = 1168080. Its totient is φ = 112320.

The previous prime is 422549. The next prime is 422551. The reversal of 422550 is 55224.

It is an interprime number because it is at equal distance from previous prime (422549) and next prime (422551).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1194 + ... + 1506.

It is an arithmetic number, because the mean of its divisors is an integer number (24335).

2⁴²²⁵⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584040).

422550 is an abundant number, since it is smaller than the sum of its proper divisors (745530).

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

422550 is a wasteful number, since it uses less digits than its factorization.

422550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 422550 is about 650.0384604006. The cubic root of 422550 is about 75.0399786856.

Adding to 422550 its reverse (55224), we get a palindrome (477774).

The spelling of 422550 in words is "four hundred twenty-two thousand, five hundred fifty".