231820147 has 8 divisors (see below), whose sum is σ = 250049744. Its totient is φ = 213647328.

The previous prime is 231820129. The next prime is 231820157. The reversal of 231820147 is 741028132.

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

It is a cyclic number.

It is not a de Polignac number, because 231820147 - 2¹¹ = 231818099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231820157) 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, 5508 + ... + 22225.

It is an arithmetic number, because the mean of its divisors is an integer number (31256218).

Almost surely, 2^231820147 is an apocalyptic number.

231820147 is a deficient number, since it is larger than the sum of its proper divisors (18229597).

231820147 is a wasteful number, since it uses less digits than its factorization.

231820147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28389.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 231820147 is about 15225.6411030866. The cubic root of 231820147 is about 614.3045409281.

Adding to 231820147 its reverse (741028132), we get a palindrome (972848279).

The spelling of 231820147 in words is "two hundred thirty-one million, eight hundred twenty thousand, one hundred forty-seven".