1215623341313 has 2 divisors, whose sum is σ = 1215623341314. Its totient is φ = 1215623341312.

The previous prime is 1215623341213. The next prime is 1215623341343. The reversal of 1215623341313 is 3131433265121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814051453504 + 401571887809 = 902248^2 + 633697^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215623341313 - 2⁸ = 1215623341057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215623341343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607811670656 + 607811670657.

It is an arithmetic number, because the mean of its divisors is an integer number (607811670657).

Almost surely, 2^{1215623341313} is an apocalyptic number.

It is an amenable number.

1215623341313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215623341313 is an equidigital number, since it uses as much as digits as its factorization.

1215623341313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The spelling of 1215623341313 in words is "one trillion, two hundred fifteen billion, six hundred twenty-three million, three hundred forty-one thousand, three hundred thirteen".