1215102513453 has 16 divisors (see below), whose sum is σ = 1624959273600. Its totient is φ = 807657909440.

The previous prime is 1215102513413. The next prime is 1215102513479. The reversal of 1215102513453 is 3543152015121.

It is a cyclic number.

It is not a de Polignac number, because 1215102513453 - 2⁶ = 1215102513389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215102513413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5690503 + ... + 5900171.

It is an arithmetic number, because the mean of its divisors is an integer number (101559954600).

Almost surely, 2^{1215102513453} is an apocalyptic number.

It is an amenable number.

1215102513453 is a deficient number, since it is larger than the sum of its proper divisors (409856760147).

1215102513453 is a wasteful number, since it uses less digits than its factorization.

1215102513453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215412.

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 1215102513453 its reverse (3543152015121), we get a palindrome (4758254528574).

The spelling of 1215102513453 in words is "one trillion, two hundred fifteen billion, one hundred two million, five hundred thirteen thousand, four hundred fifty-three".