20002231 has 8 divisors (see below), whose sum is σ = 21132720. Its totient is φ = 18879552.
The previous prime is 20002201. The next prime is 20002261. The reversal of 20002231 is 13220002.
It is an interprime number because it is at equal distance from previous prime (20002201) and next prime (20002261).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-20002231 is a prime.
It is a super-2 number, since 2×200022312 = 800178489954722, which contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20002201) 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, 3771 + ... + 7363.
It is an arithmetic number, because the mean of its divisors is an integer number (2641590).
Almost surely, 220002231 is an apocalyptic number.
20002231 is a deficient number, since it is larger than the sum of its proper divisors (1130489).
20002231 is a wasteful number, since it uses less digits than its factorization.
20002231 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3905.
The product of its (nonzero) digits is 24, while the sum is 10.
The square root of 20002231 is about 4472.3853814268. The cubic root of 20002231 is about 271.4518543937.
Adding to 20002231 its reverse (13220002), we get a palindrome (33222233).
The spelling of 20002231 in words is "twenty million, two thousand, two hundred thirty-one".
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