231514121 has 4 divisors (see below), whose sum is σ = 231583044. Its totient is φ = 231445200.

The previous prime is 231514111. The next prime is 231514133. The reversal of 231514121 is 121415132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36772096 + 194742025 = 6064^2 + 13955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231514121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231514093 and 231514102.

It is not an unprimeable number, because it can be changed into a prime (231514111) 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 3 ways as a sum of consecutive naturals, for example, 29150 + ... + 36231.

It is an arithmetic number, because the mean of its divisors is an integer number (57895761).

Almost surely, 2^231514121 is an apocalyptic number.

It is an amenable number.

231514121 is a deficient number, since it is larger than the sum of its proper divisors (68923).

231514121 is an equidigital number, since it uses as much as digits as its factorization.

231514121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68922.

The product of its digits is 240, while the sum is 20.

The square root of 231514121 is about 15215.5880924794. The cubic root of 231514121 is about 614.0341072206.

Adding to 231514121 its reverse (121415132), we get a palindrome (352929253).

It can be divided in two parts, 23151 and 4121, that added together give a palindrome (27272).

The spelling of 231514121 in words is "two hundred thirty-one million, five hundred fourteen thousand, one hundred twenty-one".