22138071 has 4 divisors (see below), whose sum is σ = 29517432. Its totient is φ = 14758712.

The previous prime is 22138069. The next prime is 22138087. The reversal of 22138071 is 17083122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22138071 - 2¹ = 22138069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22138001) 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, 3689676 + ... + 3689681.

It is an arithmetic number, because the mean of its divisors is an integer number (7379358).

Almost surely, 2^22138071 is an apocalyptic number.

22138071 is a deficient number, since it is larger than the sum of its proper divisors (7379361).

22138071 is an equidigital number, since it uses as much as digits as its factorization.

22138071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7379360.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 22138071 is about 4705.1111570291. Note that the first 4 decimals coincide. The cubic root of 22138071 is about 280.7888934211.

The spelling of 22138071 in words is "twenty-two million, one hundred thirty-eight thousand, seventy-one".