231128330 has 16 divisors (see below), whose sum is σ = 417693024. Its totient is φ = 92082000.

The previous prime is 231128323. The next prime is 231128341. The reversal of 231128330 is 33821132.

It is a junction number, because it is equal to n+sod(n) for n = 231128296 and 231128305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43532 + ... + 48551.

It is an arithmetic number, because the mean of its divisors is an integer number (26105814).

Almost surely, 2^231128330 is an apocalyptic number.

231128330 is a deficient number, since it is larger than the sum of its proper divisors (186564694).

231128330 is a wasteful number, since it uses less digits than its factorization.

231128330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92341.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 231128330 is about 15202.9053144457. The cubic root of 231128330 is about 613.6928457666.

Adding to 231128330 its reverse (33821132), we get a palindrome (264949462).

The spelling of 231128330 in words is "two hundred thirty-one million, one hundred twenty-eight thousand, three hundred thirty".