422581500 has 144 divisors (see below), whose sum is σ = 1454465376. Its totient is φ = 102432000.

The previous prime is 422581493. The next prime is 422581501. The reversal of 422581500 is 5185224.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422581501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45232 + ... + 53768.

It is an arithmetic number, because the mean of its divisors is an integer number (10100454).

Almost surely, 2^422581500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422581500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (727232688).

422581500 is an abundant number, since it is smaller than the sum of its proper divisors (1031883876).

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

422581500 is a wasteful number, since it uses less digits than its factorization.

422581500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8573 (or 8558 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 422581500 is about 20556.7872003385. The cubic root of 422581500 is about 750.4184331748.

It can be divided in two parts, 4 and 22581500, that added together give a square (22581504 = 4752²).

The spelling of 422581500 in words is "four hundred twenty-two million, five hundred eighty-one thousand, five hundred".