231340541 has 2 divisors, whose sum is σ = 231340542. Its totient is φ = 231340540.

The previous prime is 231340517. The next prime is 231340547. The reversal of 231340541 is 145043132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202492900 + 28847641 = 14230^2 + 5371^2 .

It is a cyclic number.

It is not a de Polignac number, because 231340541 - 2⁶ = 231340477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231340547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115670270 + 115670271.

It is an arithmetic number, because the mean of its divisors is an integer number (115670271).

Almost surely, 2^231340541 is an apocalyptic number.

It is an amenable number.

231340541 is a deficient number, since it is larger than the sum of its proper divisors (1).

231340541 is an equidigital number, since it uses as much as digits as its factorization.

231340541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 231340541 is about 15209.8830041523. The cubic root of 231340541 is about 613.8806094721.

Adding to 231340541 its reverse (145043132), we get a palindrome (376383673).

The spelling of 231340541 in words is "two hundred thirty-one million, three hundred forty thousand, five hundred forty-one".