231121417 has 2 divisors, whose sum is σ = 231121418. Its totient is φ = 231121416.

The previous prime is 231121369. The next prime is 231121447. The reversal of 231121417 is 714121132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209786256 + 21335161 = 14484^2 + 4619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231121417 is a prime.

It is not a weakly prime, because it can be changed into another prime (231121447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115560708 + 115560709.

It is an arithmetic number, because the mean of its divisors is an integer number (115560709).

Almost surely, 2^231121417 is an apocalyptic number.

It is an amenable number.

231121417 is a deficient number, since it is larger than the sum of its proper divisors (1).

231121417 is an equidigital number, since it uses as much as digits as its factorization.

231121417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 231121417 is about 15202.6779548868. The cubic root of 231121417 is about 613.6867272307.

Adding to 231121417 its reverse (714121132), we get a palindrome (945242549).

The spelling of 231121417 in words is "two hundred thirty-one million, one hundred twenty-one thousand, four hundred seventeen".