231776782118201 has 4 divisors (see below), whose sum is σ = 231777032768400. Its totient is φ = 231776531468004.

The previous prime is 231776782118191. The next prime is 231776782118209. The reversal of 231776782118201 is 102811287677132.

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 231776782118201 - 2¹⁴ = 231776782101817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231776782118209) 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, 123932891 + ... + 125789168.

It is an arithmetic number, because the mean of its divisors is an integer number (57944258192100).

Almost surely, 2^{231776782118201} is an apocalyptic number.

It is an amenable number.

231776782118201 is a deficient number, since it is larger than the sum of its proper divisors (250650199).

231776782118201 is an equidigital number, since it uses as much as digits as its factorization.

231776782118201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250650198.

The product of its (nonzero) digits is 3161088, while the sum is 56.

The spelling of 231776782118201 in words is "two hundred thirty-one trillion, seven hundred seventy-six billion, seven hundred eighty-two million, one hundred eighteen thousand, two hundred one".