231785106 has 64 divisors (see below), whose sum is σ = 572977152. Its totient is φ = 60993792.

The previous prime is 231785101. The next prime is 231785107. The reversal of 231785106 is 601587132.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231785101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30105 + ... + 37011.

It is an arithmetic number, because the mean of its divisors is an integer number (8952768).

Almost surely, 2^231785106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231785106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286488576).

231785106 is an abundant number, since it is smaller than the sum of its proper divisors (341192046).

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

231785106 is a wasteful number, since it uses less digits than its factorization.

231785106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6983.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 231785106 is about 15224.4903362970. The cubic root of 231785106 is about 614.2735874348.

The spelling of 231785106 in words is "two hundred thirty-one million, seven hundred eighty-five thousand, one hundred six".