231390430273 has 4 divisors (see below), whose sum is σ = 231395388160. Its totient is φ = 231385472388.

The previous prime is 231390430261. The next prime is 231390430301. The reversal of 231390430273 is 372034093132.

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-231390430273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231390430373) 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, 2408265 + ... + 2502502.

It is an arithmetic number, because the mean of its divisors is an integer number (57848847040).

Almost surely, 2^231390430273 is an apocalyptic number.

It is an amenable number.

231390430273 is a deficient number, since it is larger than the sum of its proper divisors (4957887).

231390430273 is an equidigital number, since it uses as much as digits as its factorization.

231390430273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4957886.

The product of its (nonzero) digits is 81648, while the sum is 37.

The spelling of 231390430273 in words is "two hundred thirty-one billion, three hundred ninety million, four hundred thirty thousand, two hundred seventy-three".