231105020 has 48 divisors (see below), whose sum is σ = 496419840. Its totient is φ = 90352704.

The previous prime is 231105019. The next prime is 231105029. The reversal of 231105020 is 20501132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 231104986 and 231105004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231105029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168377 + ... + 169743.

It is an arithmetic number, because the mean of its divisors is an integer number (10342080).

Almost surely, 2^231105020 is an apocalyptic number.

231105020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231105020 is an abundant number, since it is smaller than the sum of its proper divisors (265314820).

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

231105020 is a wasteful number, since it uses less digits than its factorization.

231105020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 231105020 is about 15202.1386653326. The cubic root of 231105020 is about 613.6722141386.

Adding to 231105020 its reverse (20501132), we get a palindrome (251606152).

The spelling of 231105020 in words is "two hundred thirty-one million, one hundred five thousand, twenty".