22128137 has 4 divisors (see below), whose sum is σ = 22408320. Its totient is φ = 21847956.

The previous prime is 22128121. The next prime is 22128143. The reversal of 22128137 is 73182122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22128137 - 2⁴ = 22128121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22128107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139973 + ... + 140130.

It is an arithmetic number, because the mean of its divisors is an integer number (5602080).

Almost surely, 2^22128137 is an apocalyptic number.

It is an amenable number.

22128137 is a deficient number, since it is larger than the sum of its proper divisors (280183).

22128137 is an equidigital number, since it uses as much as digits as its factorization.

22128137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280182.

The product of its digits is 1344, while the sum is 26.

The square root of 22128137 is about 4704.0553780754. The cubic root of 22128137 is about 280.7468877409.

The spelling of 22128137 in words is "twenty-two million, one hundred twenty-eight thousand, one hundred thirty-seven".