22631000 has 128 divisors (see below), whose sum is σ = 62674560. Its totient is φ = 7488000.

The previous prime is 22630999. The next prime is 22631003. The reversal of 22631000 is 13622.

It is a super-2 number, since 2×22631000² = 1024324322000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22631003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370970 + ... + 371030.

It is an arithmetic number, because the mean of its divisors is an integer number (489645).

Almost surely, 2^22631000 is an apocalyptic number.

22631000 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 22631000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31337280).

22631000 is an abundant number, since it is smaller than the sum of its proper divisors (40043560).

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

22631000 is a wasteful number, since it uses less digits than its factorization.

22631000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 22631000 is about 4757.2050617984. The cubic root of 22631000 is about 282.8576408618.

Adding to 22631000 its reverse (13622), we get a palindrome (22644622).

The spelling of 22631000 in words is "twenty-two million, six hundred thirty-one thousand".