231581230 has 16 divisors (see below), whose sum is σ = 426541104. Its totient is φ = 90478080.

The previous prime is 231581219. The next prime is 231581237. The reversal of 231581230 is 32185132.

It is a junction number, because it is equal to n+sod(n) for n = 231581195 and 231581204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231581237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268851 + ... + 269710.

It is an arithmetic number, because the mean of its divisors is an integer number (26658819).

Almost surely, 2^231581230 is an apocalyptic number.

231581230 is a deficient number, since it is larger than the sum of its proper divisors (194959874).

231581230 is a wasteful number, since it uses less digits than its factorization.

231581230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538611.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 231581230 is about 15217.7932040096. The cubic root of 231581230 is about 614.0934315126.

The spelling of 231581230 in words is "two hundred thirty-one million, five hundred eighty-one thousand, two hundred thirty".