264431543 has 2 divisors, whose sum is σ = 264431544. Its totient is φ = 264431542.

The previous prime is 264431539. The next prime is 264431593. The reversal of 264431543 is 345134462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264431543 - 2² = 264431539 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264431533) 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, 132215771 + 132215772.

It is an arithmetic number, because the mean of its divisors is an integer number (132215772).

Almost surely, 2^264431543 is an apocalyptic number.

264431543 is a deficient number, since it is larger than the sum of its proper divisors (1).

264431543 is an equidigital number, since it uses as much as digits as its factorization.

264431543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 32.

The square root of 264431543 is about 16261.3512046201. The cubic root of 264431543 is about 641.8562183876.

The spelling of 264431543 in words is "two hundred sixty-four million, four hundred thirty-one thousand, five hundred forty-three".