172431563 has 2 divisors, whose sum is σ = 172431564. Its totient is φ = 172431562.

The previous prime is 172431557. The next prime is 172431577. The reversal of 172431563 is 365134271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172431563 - 2⁴ = 172431547 is a prime.

It is not a weakly prime, because it can be changed into another prime (172431163) 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, 86215781 + 86215782.

It is an arithmetic number, because the mean of its divisors is an integer number (86215782).

Almost surely, 2^172431563 is an apocalyptic number.

172431563 is a deficient number, since it is larger than the sum of its proper divisors (1).

172431563 is an equidigital number, since it uses as much as digits as its factorization.

172431563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 172431563 is about 13131.3199260394. The cubic root of 172431563 is about 556.5945142160.

The spelling of 172431563 in words is "one hundred seventy-two million, four hundred thirty-one thousand, five hundred sixty-three".