231209530 has 8 divisors (see below), whose sum is σ = 416177172. Its totient is φ = 92483808.

The previous prime is 231209521. The next prime is 231209551. The reversal of 231209530 is 35902132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 231070401 + 139129 = 15201^2 + 373^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 231209495 and 231209504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11560467 + ... + 11560486.

Almost surely, 2^231209530 is an apocalyptic number.

231209530 is a deficient number, since it is larger than the sum of its proper divisors (184967642).

231209530 is a wasteful number, since it uses less digits than its factorization.

231209530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23120960.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 231209530 is about 15205.5756221197. The cubic root of 231209530 is about 613.7647048712.

The spelling of 231209530 in words is "two hundred thirty-one million, two hundred nine thousand, five hundred thirty".