231785104 has 30 divisors (see below), whose sum is σ = 473975430. Its totient is φ = 109790208.

The previous prime is 231785101. The next prime is 231785107. The reversal of 231785104 is 401587132.

It is an interprime number because it is at equal distance from previous prime (231785101) and next prime (231785107).

It can be written as a sum of positive squares in only one way, i.e., 126517504 + 105267600 = 11248^2 + 10260^2 .

It is a super-3 number, since 3×231785104³ (a number of 26 digits) contains 333 as substring.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14289 + ... + 25840.

It is an arithmetic number, because the mean of its divisors is an integer number (15799181).

Almost surely, 2^231785104 is an apocalyptic number.

It is an amenable number.

231785104 is an abundant number, since it is smaller than the sum of its proper divisors (242190326).

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

231785104 is a wasteful number, since it uses less digits than its factorization.

231785104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40175 (or 40150 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 231785104 is about 15224.4902706133. The cubic root of 231785104 is about 614.2735856680.

It can be divided in two parts, 23178 and 5104, that added together give a palindrome (28282).

The spelling of 231785104 in words is "two hundred thirty-one million, seven hundred eighty-five thousand, one hundred four".