231300021 has 8 divisors (see below), whose sum is σ = 318348544. Its totient is φ = 149225760.

The previous prime is 231299953. The next prime is 231300049. The reversal of 231300021 is 120003132.

It is a happy number.

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

It is not a de Polignac number, because 231300021 - 2¹¹ = 231297973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231300821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1243456 + ... + 1243641.

It is an arithmetic number, because the mean of its divisors is an integer number (39793568).

Almost surely, 2^231300021 is an apocalyptic number.

It is an amenable number.

231300021 is a deficient number, since it is larger than the sum of its proper divisors (87048523).

231300021 is a wasteful number, since it uses less digits than its factorization.

231300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487131.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 231300021 is about 15208.5509171650. The cubic root of 231300021 is about 613.8447663602.

Adding to 231300021 its reverse (120003132), we get a palindrome (351303153).

The spelling of 231300021 in words is "two hundred thirty-one million, three hundred thousand, twenty-one".