231205162133 has 4 divisors (see below), whose sum is σ = 252223813248. Its totient is φ = 210186511020.

The previous prime is 231205162109. The next prime is 231205162151. The reversal of 231205162133 is 331261502132.

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 231205162133 - 2¹⁴ = 231205145749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231205162096 and 231205162105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231205162163) 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, 10509325541 + ... + 10509325562.

It is an arithmetic number, because the mean of its divisors is an integer number (63055953312).

Almost surely, 2^231205162133 is an apocalyptic number.

It is an amenable number.

231205162133 is a deficient number, since it is larger than the sum of its proper divisors (21018651115).

231205162133 is a wasteful number, since it uses less digits than its factorization.

231205162133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21018651114.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 231205162133 its reverse (331261502132), we get a palindrome (562466664265).

The spelling of 231205162133 in words is "two hundred thirty-one billion, two hundred five million, one hundred sixty-two thousand, one hundred thirty-three".