22065231 has 8 divisors (see below), whose sum is σ = 30046464. Its totient is φ = 14397080.

The previous prime is 22065223. The next prime is 22065293. The reversal of 22065231 is 13256022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22065231 - 2³ = 22065223 is a prime.

It is a super-2 number, since 2×22065231² = 973748838166722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22065198 and 22065207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22065221) 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 7 ways as a sum of consecutive naturals, for example, 78105 + ... + 78386.

It is an arithmetic number, because the mean of its divisors is an integer number (3755808).

Almost surely, 2^22065231 is an apocalyptic number.

22065231 is a deficient number, since it is larger than the sum of its proper divisors (7981233).

22065231 is a wasteful number, since it uses less digits than its factorization.

22065231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156541.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22065231 is about 4697.3642609446. The cubic root of 22065231 is about 280.4805989358.

The spelling of 22065231 in words is "twenty-two million, sixty-five thousand, two hundred thirty-one".