230901643921 has 4 divisors (see below), whose sum is σ = 248663308852. Its totient is φ = 213139978992.

The previous prime is 230901643913. The next prime is 230901643979. The reversal of 230901643921 is 129346109032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30542455696 + 200359188225 = 174764^2 + 447615^2 .

It is a cyclic number.

It is not a de Polignac number, because 230901643921 - 2³ = 230901643913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230901643981) 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, 8880832446 + ... + 8880832471.

It is an arithmetic number, because the mean of its divisors is an integer number (62165827213).

Almost surely, 2^230901643921 is an apocalyptic number.

It is an amenable number.

230901643921 is a deficient number, since it is larger than the sum of its proper divisors (17761664931).

230901643921 is a wasteful number, since it uses less digits than its factorization.

230901643921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17761664930.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 230901643921 in words is "two hundred thirty billion, nine hundred one million, six hundred forty-three thousand, nine hundred twenty-one".