1215531450015 has 32 divisors (see below), whose sum is σ = 1949371944960. Its totient is φ = 646776700416.

The previous prime is 1215531450013. The next prime is 1215531450037. The reversal of 1215531450015 is 5100541355121.

It is a happy number.

It is not a de Polignac number, because 1215531450015 - 2¹ = 1215531450013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215531450013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60335034 + ... + 60355176.

It is an arithmetic number, because the mean of its divisors is an integer number (60917873280).

Almost surely, 2^{1215531450015} is an apocalyptic number.

1215531450015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1215531450015 is a deficient number, since it is larger than the sum of its proper divisors (733840494945).

1215531450015 is a wasteful number, since it uses less digits than its factorization.

1215531450015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29303.

The product of its (nonzero) digits is 15000, while the sum is 33.

The spelling of 1215531450015 in words is "one trillion, two hundred fifteen billion, five hundred thirty-one million, four hundred fifty thousand, fifteen".