405343031 has 2 divisors, whose sum is σ = 405343032. Its totient is φ = 405343030.

The previous prime is 405343013. The next prime is 405343079. The reversal of 405343031 is 130343504.

Together with previous prime (405343013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405343031 - 2¹⁸ = 405080887 is a prime.

It is a super-2 number, since 2×405343031² = 328605945560533922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 405342988 and 405343006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405340031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202671515 + 202671516.

It is an arithmetic number, because the mean of its divisors is an integer number (202671516).

Almost surely, 2^405343031 is an apocalyptic number.

405343031 is a deficient number, since it is larger than the sum of its proper divisors (1).

405343031 is an equidigital number, since it uses as much as digits as its factorization.

405343031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 405343031 is about 20133.1326673223. The cubic root of 405343031 is about 740.0724490791.

Adding to 405343031 its reverse (130343504), we get a palindrome (535686535).

The spelling of 405343031 in words is "four hundred five million, three hundred forty-three thousand, thirty-one".