231312141 has 6 divisors (see below), whose sum is σ = 334117550. Its totient is φ = 154208088.

The previous prime is 231312139. The next prime is 231312143. The reversal of 231312141 is 141213132.

231312141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231312139) and next prime (231312143).

It can be written as a sum of positive squares in only one way, i.e., 185749641 + 45562500 = 13629^2 + 6750^2 .

It is not a de Polignac number, because 231312141 - 2¹ = 231312139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231312143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12850666 + ... + 12850683.

Almost surely, 2^231312141 is an apocalyptic number.

It is an amenable number.

231312141 is a deficient number, since it is larger than the sum of its proper divisors (102805409).

231312141 is a wasteful number, since it uses less digits than its factorization.

231312141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25701355 (or 25701352 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 231312141 is about 15208.9493719981. The cubic root of 231312141 is about 613.8554878877.

Adding to 231312141 its reverse (141213132), we get a palindrome (372525273).

Subtracting from 231312141 its reverse (141213132), we obtain a palindrome (90099009).

The spelling of 231312141 in words is "two hundred thirty-one million, three hundred twelve thousand, one hundred forty-one".