231040357 has 2 divisors, whose sum is σ = 231040358. Its totient is φ = 231040356.

The previous prime is 231040343. The next prime is 231040363. The reversal of 231040357 is 753040132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159112996 + 71927361 = 12614^2 + 8481^2 .

It is a cyclic number.

It is not a de Polignac number, because 231040357 - 2¹⁵ = 231007589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231040157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115520178 + 115520179.

It is an arithmetic number, because the mean of its divisors is an integer number (115520179).

Almost surely, 2^231040357 is an apocalyptic number.

It is an amenable number.

231040357 is a deficient number, since it is larger than the sum of its proper divisors (1).

231040357 is an equidigital number, since it uses as much as digits as its factorization.

231040357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 231040357 is about 15200.0117434165. The cubic root of 231040357 is about 613.6149738012.

Adding to 231040357 its reverse (753040132), we get a palindrome (984080489).

The spelling of 231040357 in words is "two hundred thirty-one million, forty thousand, three hundred fifty-seven".