231741421 has 2 divisors, whose sum is σ = 231741422. Its totient is φ = 231741420.

The previous prime is 231741413. The next prime is 231741431. The reversal of 231741421 is 124147132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231465796 + 275625 = 15214^2 + 525^2 .

It is a cyclic number.

It is not a de Polignac number, because 231741421 - 2³ = 231741413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231741401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115870710 + 115870711.

It is an arithmetic number, because the mean of its divisors is an integer number (115870711).

Almost surely, 2^231741421 is an apocalyptic number.

It is an amenable number.

231741421 is a deficient number, since it is larger than the sum of its proper divisors (1).

231741421 is an equidigital number, since it uses as much as digits as its factorization.

231741421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 231741421 is about 15223.0555737014. The cubic root of 231741421 is about 614.2349938884.

Adding to 231741421 its reverse (124147132), we get a palindrome (355888553).

The spelling of 231741421 in words is "two hundred thirty-one million, seven hundred forty-one thousand, four hundred twenty-one".