1215445240013 has 2 divisors, whose sum is σ = 1215445240014. Its totient is φ = 1215445240012.

The previous prime is 1215445240007. The next prime is 1215445240091. The reversal of 1215445240013 is 3100425445121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1151558633449 + 63886606564 = 1073107^2 + 252758^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215445240013 - 2³⁴ = 1198265370829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215445240913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607722620006 + 607722620007.

It is an arithmetic number, because the mean of its divisors is an integer number (607722620007).

Almost surely, 2^{1215445240013} is an apocalyptic number.

It is an amenable number.

1215445240013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215445240013 is an equidigital number, since it uses as much as digits as its factorization.

1215445240013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 1215445240013 in words is "one trillion, two hundred fifteen billion, four hundred forty-five million, two hundred forty thousand, thirteen".