422251000 has 128 divisors (see below), whose sum is σ = 1043228160. Its totient is φ = 159744000.

The previous prime is 422250943. The next prime is 422251001. The reversal of 422251000 is 152224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422251001) 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, 1642872 + ... + 1643128.

It is an arithmetic number, because the mean of its divisors is an integer number (8150220).

Almost surely, 2^422251000 is an apocalyptic number.

422251000 is a gapful number since it is divisible by the number (40) 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 422251000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521614080).

422251000 is an abundant number, since it is smaller than the sum of its proper divisors (620977160).

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

422251000 is a wasteful number, since it uses less digits than its factorization.

422251000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 422251000 is about 20548.7469204329. The cubic root of 422251000 is about 750.2227486523. Note that the first 3 decimals are identical.

The spelling of 422251000 in words is "four hundred twenty-two million, two hundred fifty-one thousand".