230133728581 has 4 divisors (see below), whose sum is σ = 231945805312. Its totient is φ = 228321651852.

The previous prime is 230133728579. The next prime is 230133728651. The reversal of 230133728581 is 185827331032.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 230133728581 - 2¹ = 230133728579 is a prime.

It is a super-2 number, since 2×230133728581² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230133798581) 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, 906038175 + ... + 906038428.

It is an arithmetic number, because the mean of its divisors is an integer number (57986451328).

Almost surely, 2^230133728581 is an apocalyptic number.

It is an amenable number.

230133728581 is a deficient number, since it is larger than the sum of its proper divisors (1812076731).

230133728581 is a wasteful number, since it uses less digits than its factorization.

230133728581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812076730.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 230133728581 in words is "two hundred thirty billion, one hundred thirty-three million, seven hundred twenty-eight thousand, five hundred eighty-one".