20226231 has 12 divisors (see below), whose sum is σ = 29767608. Its totient is φ = 13229424.

The previous prime is 20226221. The next prime is 20226233. The reversal of 20226231 is 13262202.

20226231 is a `hidden beast` number, since 20 + 22 + 623 + 1 = 666.

It is not a de Polignac number, because 20226231 - 2⁹ = 20225719 is a prime.

It is a super-2 number, since 2×20226231² = 818200840930722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20226233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20725 + ... + 21678.

It is an arithmetic number, because the mean of its divisors is an integer number (2480634).

Almost surely, 2^20226231 is an apocalyptic number.

20226231 is a deficient number, since it is larger than the sum of its proper divisors (9541377).

20226231 is a wasteful number, since it uses less digits than its factorization.

20226231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42462 (or 42459 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20226231 is about 4497.3582245581. The cubic root of 20226231 is about 272.4614023833.

Adding to 20226231 its reverse (13262202), we get a palindrome (33488433).

The spelling of 20226231 in words is "twenty million, two hundred twenty-six thousand, two hundred thirty-one".