231880447 has 2 divisors, whose sum is σ = 231880448. Its totient is φ = 231880446.

The previous prime is 231880399. The next prime is 231880463. The reversal of 231880447 is 744088132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231880447 - 2¹¹ = 231878399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231830447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115940223 + 115940224.

It is an arithmetic number, because the mean of its divisors is an integer number (115940224).

Almost surely, 2^231880447 is an apocalyptic number.

231880447 is a deficient number, since it is larger than the sum of its proper divisors (1).

231880447 is an equidigital number, since it uses as much as digits as its factorization.

231880447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 231880447 is about 15227.6211865150. The cubic root of 231880447 is about 614.3577996762.

The spelling of 231880447 in words is "two hundred thirty-one million, eight hundred eighty thousand, four hundred forty-seven".