233145312134321 has 4 divisors (see below), whose sum is σ = 233231694246000. Its totient is φ = 233058930022644.

The previous prime is 233145312134309. The next prime is 233145312134341. The reversal of 233145312134321 is 123431213541332.

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 a de Polignac number, because none of the positive numbers 2^k-233145312134321 is a prime.

It is a super-2 number, since 2×233145312134321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233145312134341) 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, 43191051791 + ... + 43191057188.

It is an arithmetic number, because the mean of its divisors is an integer number (58307923561500).

Almost surely, 2^{233145312134321} is an apocalyptic number.

It is an amenable number.

233145312134321 is a deficient number, since it is larger than the sum of its proper divisors (86382111679).

233145312134321 is an equidigital number, since it uses as much as digits as its factorization.

233145312134321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86382111678.

The product of its digits is 155520, while the sum is 38.

Adding to 233145312134321 its reverse (123431213541332), we get a palindrome (356576525675653).

The spelling of 233145312134321 in words is "two hundred thirty-three trillion, one hundred forty-five billion, three hundred twelve million, one hundred thirty-four thousand, three hundred twenty-one".