20207231 has 8 divisors (see below), whose sum is σ = 22194000. Its totient is φ = 18245440.

The previous prime is 20207221. The next prime is 20207233. The reversal of 20207231 is 13270202.

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 20207231 - 2¹⁴ = 20190847 is a prime.

It is a super-2 number, since 2×20207231² = 816664369374722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20207233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4526 + ... + 7803.

It is an arithmetic number, because the mean of its divisors is an integer number (2774250).

Almost surely, 2^20207231 is an apocalyptic number.

20207231 is a deficient number, since it is larger than the sum of its proper divisors (1986769).

20207231 is a wasteful number, since it uses less digits than its factorization.

20207231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12489.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20207231 is about 4495.2453770623. The cubic root of 20207231 is about 272.3760612493.

Adding to 20207231 its reverse (13270202), we get a palindrome (33477433).

The spelling of 20207231 in words is "twenty million, two hundred seven thousand, two hundred thirty-one".