1215353385823 has 2 divisors, whose sum is σ = 1215353385824. Its totient is φ = 1215353385822.

The previous prime is 1215353385821. The next prime is 1215353385881. The reversal of 1215353385823 is 3285833535121.

It is a weak prime.

It is an emirp because it is prime and its reverse (3285833535121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1215353385823 - 2¹ = 1215353385821 is a prime.

Together with 1215353385821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215353385821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607676692911 + 607676692912.

It is an arithmetic number, because the mean of its divisors is an integer number (607676692912).

Almost surely, 2^{1215353385823} is an apocalyptic number.

1215353385823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215353385823 is an equidigital number, since it uses as much as digits as its factorization.

1215353385823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592000, while the sum is 49.

The spelling of 1215353385823 in words is "one trillion, two hundred fifteen billion, three hundred fifty-three million, three hundred eighty-five thousand, eight hundred twenty-three".