231122020 has 24 divisors (see below), whose sum is σ = 487449144. Its totient is φ = 92050176.

The previous prime is 231121973. The next prime is 231122027. The reversal of 231122020 is 20221132.

It can be written as a sum of positive squares in 4 ways, for example, as 3232804 + 227889216 = 1798^2 + 15096^2 .

It is not an unprimeable number, because it can be changed into a prime (231122027) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20139 + ... + 29458.

It is an arithmetic number, because the mean of its divisors is an integer number (20310381).

Almost surely, 2^231122020 is an apocalyptic number.

231122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231122020 is an abundant number, since it is smaller than the sum of its proper divisors (256327124).

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

231122020 is a wasteful number, since it uses less digits than its factorization.

231122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49839 (or 49837 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 231122020 is about 15202.6977869061. The cubic root of 231122020 is about 613.6872609369.

Adding to 231122020 its reverse (20221132), we get a palindrome (251343152).

The spelling of 231122020 in words is "two hundred thirty-one million, one hundred twenty-two thousand, twenty".