230172434721 has 12 divisors (see below), whose sum is σ = 332476542372. Its totient is φ = 153445867776.

The previous prime is 230172434699. The next prime is 230172434753. The reversal of 230172434721 is 127434271032.

230172434721 is a `hidden beast` number, since 2 + 30 + 172 + 434 + 7 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29074001121 + 201098433600 = 170511^2 + 448440^2 .

It is not a de Polignac number, because 230172434721 - 2¹³ = 230172426529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (230172434321) 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 in 11 ways as a sum of consecutive naturals, for example, 545785 + ... + 870761.

It is an arithmetic number, because the mean of its divisors is an integer number (27706378531).

Almost surely, 2^230172434721 is an apocalyptic number.

It is an amenable number.

230172434721 is a deficient number, since it is larger than the sum of its proper divisors (102304107651).

230172434721 is a wasteful number, since it uses less digits than its factorization.

230172434721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403680 (or 403677 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The spelling of 230172434721 in words is "two hundred thirty billion, one hundred seventy-two million, four hundred thirty-four thousand, seven hundred twenty-one".