231402113 has 8 divisors (see below), whose sum is σ = 245677608. Its totient is φ = 217200384.

The previous prime is 231402109. The next prime is 231402131. The reversal of 231402113 is 311204132.

231402113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15547249 + 215854864 = 3943^2 + 14692^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231402113 - 2² = 231402109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 231402091 and 231402100.

It is not an unprimeable number, because it can be changed into a prime (231402163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11906 + ... + 24587.

It is an arithmetic number, because the mean of its divisors is an integer number (30709701).

Almost surely, 2^231402113 is an apocalyptic number.

It is an amenable number.

231402113 is a deficient number, since it is larger than the sum of its proper divisors (14275495).

231402113 is a wasteful number, since it uses less digits than its factorization.

231402113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36883.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 231402113 is about 15211.9069481771. The cubic root of 231402113 is about 613.9350667149.

Adding to 231402113 its reverse (311204132), we get a palindrome (542606245).

The spelling of 231402113 in words is "two hundred thirty-one million, four hundred two thousand, one hundred thirteen".