1213540231415 has 16 divisors (see below), whose sum is σ = 1543038040512. Its totient is φ = 913055906304.

The previous prime is 1213540231349. The next prime is 1213540231417. The reversal of 1213540231415 is 5141320453121.

It is a cyclic number.

It is not a de Polignac number, because 1213540231415 - 2¹⁴ = 1213540215031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213540231417) 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, 5105804 + ... + 5338193.

It is an arithmetic number, because the mean of its divisors is an integer number (96439877532).

Almost surely, 2^{1213540231415} is an apocalyptic number.

1213540231415 is a deficient number, since it is larger than the sum of its proper divisors (329497809097).

1213540231415 is a wasteful number, since it uses less digits than its factorization.

1213540231415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10445386.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 1213540231415 its reverse (5141320453121), we get a palindrome (6354860684536).

The spelling of 1213540231415 in words is "one trillion, two hundred thirteen billion, five hundred forty million, two hundred thirty-one thousand, four hundred fifteen".