231003723921 has 8 divisors (see below), whose sum is σ = 308017800480. Its totient is φ = 153996064992.

The previous prime is 231003723919. The next prime is 231003723947. The reversal of 231003723921 is 129327300132.

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

It is not a de Polignac number, because 231003723921 - 2¹ = 231003723919 is a prime.

It is a super-2 number, since 2×231003723921² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231003723521) 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, 1519780 + ... + 1664853.

It is an arithmetic number, because the mean of its divisors is an integer number (38502225060).

Almost surely, 2^231003723921 is an apocalyptic number.

It is an amenable number.

231003723921 is a deficient number, since it is larger than the sum of its proper divisors (77014076559).

231003723921 is a wasteful number, since it uses less digits than its factorization.

231003723921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3208815.

The product of its (nonzero) digits is 13608, while the sum is 33.

The spelling of 231003723921 in words is "two hundred thirty-one billion, three million, seven hundred twenty-three thousand, nine hundred twenty-one".