231113250 has 160 divisors (see below), whose sum is σ = 658470384. Its totient is φ = 60480000.

The previous prime is 231113243. The next prime is 231113257. The reversal of 231113250 is 52311132.

It is an interprime number because it is at equal distance from previous prime (231113243) and next prime (231113257).

It can be written as a sum of positive squares in 8 ways, for example, as 4941729 + 226171521 = 2223^2 + 15039^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (231113257) 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 79 ways as a sum of consecutive naturals, for example, 2045194 + ... + 2045306.

Almost surely, 2^231113250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231113250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329235192).

231113250 is an abundant number, since it is smaller than the sum of its proper divisors (427357134).

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

231113250 is a wasteful number, since it uses less digits than its factorization.

231113250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 231113250 is about 15202.4093485210. The cubic root of 231113250 is about 613.6794986513.

Adding to 231113250 its reverse (52311132), we get a palindrome (283424382).

The spelling of 231113250 in words is "two hundred thirty-one million, one hundred thirteen thousand, two hundred fifty".