1215442453403 has 16 divisors (see below), whose sum is σ = 1270145214720. Its totient is φ = 1160895765216.

The previous prime is 1215442453399. The next prime is 1215442453409. The reversal of 1215442453403 is 3043542445121.

It is a cyclic number.

It is not a de Polignac number, because 1215442453403 - 2² = 1215442453399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215442453409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46048976 + ... + 46075362.

It is an arithmetic number, because the mean of its divisors is an integer number (79384075920).

Almost surely, 2^{1215442453403} is an apocalyptic number.

1215442453403 is a deficient number, since it is larger than the sum of its proper divisors (54702761317).

1215442453403 is a wasteful number, since it uses less digits than its factorization.

1215442453403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29266.

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 1215442453403 its reverse (3043542445121), we get a palindrome (4258984898524).

The spelling of 1215442453403 in words is "one trillion, two hundred fifteen billion, four hundred forty-two million, four hundred fifty-three thousand, four hundred three".