231020226 has 48 divisors (see below), whose sum is σ = 511168320. Its totient is φ = 75388320.

The previous prime is 231020197. The next prime is 231020233. The reversal of 231020226 is 622020132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231020199 and 231020208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207760 + ... + 208868.

It is an arithmetic number, because the mean of its divisors is an integer number (10649340).

Almost surely, 2^231020226 is an apocalyptic number.

231020226 is an abundant number, since it is smaller than the sum of its proper divisors (280148094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231020226 is a wasteful number, since it uses less digits than its factorization.

231020226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351 (or 1348 counting only the distinct ones).

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

The square root of 231020226 is about 15199.3495255554. The cubic root of 231020226 is about 613.5971514577.

Adding to 231020226 its reverse (622020132), we get a palindrome (853040358).

The spelling of 231020226 in words is "two hundred thirty-one million, twenty thousand, two hundred twenty-six".