22851000 has 96 divisors (see below), whose sum is σ = 77266800. Its totient is φ = 6091200.

The previous prime is 22850963. The next prime is 22851011. The reversal of 22851000 is 15822.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7731 + ... + 10269.

Almost surely, 2^22851000 is an apocalyptic number.

22851000 is a gapful number since it is divisible by the number (20) 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 22851000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38633400).

22851000 is an abundant number, since it is smaller than the sum of its proper divisors (54415800).

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

22851000 is a wasteful number, since it uses less digits than its factorization.

22851000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566 (or 2549 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 22851000 is about 4780.2719587906. The cubic root of 22851000 is about 283.7712566634.

Adding to 22851000 its reverse (15822), we get a palindrome (22866822).

The spelling of 22851000 in words is "twenty-two million, eight hundred fifty-one thousand".