1215545503430 has 16 divisors (see below), whose sum is σ = 2188172422080. Its totient is φ = 486175864512.

The previous prime is 1215545503421. The next prime is 1215545503433. The reversal of 1215545503430 is 343055455121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215545503433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5171390 + ... + 5401329.

It is an arithmetic number, because the mean of its divisors is an integer number (136760776380).

Almost surely, 2^{1215545503430} is an apocalyptic number.

1215545503430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215545503430 is a deficient number, since it is larger than the sum of its proper divisors (972626918650).

1215545503430 is a wasteful number, since it uses less digits than its factorization.

1215545503430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10584223.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 1215545503430 in words is "one trillion, two hundred fifteen billion, five hundred forty-five million, five hundred three thousand, four hundred thirty".