231030402 has 8 divisors (see below), whose sum is σ = 462060816. Its totient is φ = 77010132.

The previous prime is 231030347. The next prime is 231030403. The reversal of 231030402 is 204030132.

231030402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

231030402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (231030403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19252528 + ... + 19252539.

It is an arithmetic number, because the mean of its divisors is an integer number (57757602).

Almost surely, 2^231030402 is an apocalyptic number.

231030402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231030402 is a wasteful number, since it uses less digits than its factorization.

231030402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38505072.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 231030402 is about 15199.6842730367. The cubic root of 231030402 is about 613.6061605865.

Adding to 231030402 its reverse (204030132), we get a palindrome (435060534).

The spelling of 231030402 in words is "two hundred thirty-one million, thirty thousand, four hundred two".