231105420 has 192 divisors, whose sum is σ = 885104640. Its totient is φ = 48750336.

The previous prime is 231105409. The next prime is 231105461. The reversal of 231105420 is 24501132.

231105420 is a `hidden beast` number, since 231 + 10 + 5 + 420 = 666.

231105420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 231105393 and 231105402.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46789 + ... + 51491.

It is an arithmetic number, because the mean of its divisors is an integer number (4609920).

Almost surely, 2^231105420 is an apocalyptic number.

231105420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231105420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442552320).

231105420 is an abundant number, since it is smaller than the sum of its proper divisors (653999220).

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

231105420 is a wasteful number, since it uses less digits than its factorization.

231105420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4741 (or 4733 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 231105420 is about 15202.1518213706. The cubic root of 231105420 is about 613.6725681894.

Adding to 231105420 its reverse (24501132), we get a palindrome (255606552).

The spelling of 231105420 in words is "two hundred thirty-one million, one hundred five thousand, four hundred twenty".