1391661350231 has 2 divisors, whose sum is σ = 1391661350232. Its totient is φ = 1391661350230.

The previous prime is 1391661350197. The next prime is 1391661350257. The reversal of 1391661350231 is 1320531661931.

It is a strong prime.

It is an emirp because it is prime and its reverse (1320531661931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1391661350231 - 2¹⁰ = 1391661349207 is a prime.

It is a super-2 number, since 2×1391661350231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391661350291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695830675115 + 695830675116.

It is an arithmetic number, because the mean of its divisors is an integer number (695830675116).

Almost surely, 2^{1391661350231} is an apocalyptic number.

1391661350231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391661350231 is an equidigital number, since it uses as much as digits as its factorization.

1391661350231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 41.

The spelling of 1391661350231 in words is "one trillion, three hundred ninety-one billion, six hundred sixty-one million, three hundred fifty thousand, two hundred thirty-one".