263400331 has 2 divisors, whose sum is σ = 263400332. Its totient is φ = 263400330.

The previous prime is 263400317. The next prime is 263400349. The reversal of 263400331 is 133004362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263400331 - 2¹¹ = 263398283 is a prime.

It is a super-2 number, since 2×263400331² = 138759468741819122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (263400311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131700165 + 131700166.

It is an arithmetic number, because the mean of its divisors is an integer number (131700166).

Almost surely, 2^263400331 is an apocalyptic number.

263400331 is a deficient number, since it is larger than the sum of its proper divisors (1).

263400331 is an equidigital number, since it uses as much as digits as its factorization.

263400331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 263400331 is about 16229.6127803469. The cubic root of 263400331 is about 641.0207758207.

Adding to 263400331 its reverse (133004362), we get a palindrome (396404693).

The spelling of 263400331 in words is "two hundred sixty-three million, four hundred thousand, three hundred thirty-one".