231078355213 has 2 divisors, whose sum is σ = 231078355214. Its totient is φ = 231078355212.

The previous prime is 231078355171. The next prime is 231078355241. The reversal of 231078355213 is 312553870132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151556047204 + 79522308009 = 389302^2 + 281997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231078355213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231078355913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115539177606 + 115539177607.

It is an arithmetic number, because the mean of its divisors is an integer number (115539177607).

Almost surely, 2^231078355213 is an apocalyptic number.

It is an amenable number.

231078355213 is a deficient number, since it is larger than the sum of its proper divisors (1).

231078355213 is an equidigital number, since it uses as much as digits as its factorization.

231078355213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 231078355213 in words is "two hundred thirty-one billion, seventy-eight million, three hundred fifty-five thousand, two hundred thirteen".