22129500 has 48 divisors (see below), whose sum is σ = 64445472. Its totient is φ = 5900800.

The previous prime is 22129423. The next prime is 22129501. The reversal of 22129500 is 592122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22129501) 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 15 ways as a sum of consecutive naturals, for example, 5877 + ... + 8876.

It is an arithmetic number, because the mean of its divisors is an integer number (1342614).

Almost surely, 2^22129500 is an apocalyptic number.

22129500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22129500 is an abundant number, since it is smaller than the sum of its proper divisors (42315972).

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

22129500 is a wasteful number, since it uses less digits than its factorization.

22129500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14775 (or 14763 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 22129500 is about 4704.2002508397. The cubic root of 22129500 is about 280.7526518977.

The spelling of 22129500 in words is "twenty-two million, one hundred twenty-nine thousand, five hundred".