231736345133 has 4 divisors (see below), whose sum is σ = 231737334780. Its totient is φ = 231735355488.

The previous prime is 231736345123. The next prime is 231736345213. The reversal of 231736345133 is 331543637132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 67515266569 + 164221078564 = 259837^2 + 405242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231736345133 is a prime.

It is a super-3 number, since 3×231736345133³ (a number of 35 digits) contains 333 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 (231736345123) 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, 75641 + ... + 684977.

It is an arithmetic number, because the mean of its divisors is an integer number (57934333695).

Almost surely, 2^231736345133 is an apocalyptic number.

It is an amenable number.

231736345133 is a deficient number, since it is larger than the sum of its proper divisors (989647).

231736345133 is an equidigital number, since it uses as much as digits as its factorization.

231736345133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989646.

The product of its digits is 408240, while the sum is 41.

The spelling of 231736345133 in words is "two hundred thirty-one billion, seven hundred thirty-six million, three hundred forty-five thousand, one hundred thirty-three".