231772930 has 16 divisors (see below), whose sum is σ = 431577720. Its totient is φ = 89512192.

The previous prime is 231772907. The next prime is 231772939. The reversal of 231772930 is 39277132.

It can be written as a sum of positive squares in 4 ways, for example, as 130347889 + 101425041 = 11417^2 + 10071^2 .

It is not an unprimeable number, because it can be changed into a prime (231772939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399319 + ... + 399898.

Almost surely, 2^231772930 is an apocalyptic number.

231772930 is a deficient number, since it is larger than the sum of its proper divisors (199804790).

231772930 is a wasteful number, since it uses less digits than its factorization.

231772930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799253.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 231772930 is about 15224.0904490219. The cubic root of 231772930 is about 614.2628310258.

The spelling of 231772930 in words is "two hundred thirty-one million, seven hundred seventy-two thousand, nine hundred thirty".