1215413353520 has 20 divisors (see below), whose sum is σ = 2825836047120. Its totient is φ = 486165341376.

The previous prime is 1215413353513. The next prime is 1215413353537. The reversal of 1215413353520 is 253533145121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×1215413353520³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7596333380 + ... + 7596333539.

It is an arithmetic number, because the mean of its divisors is an integer number (141291802356).

Almost surely, 2^{1215413353520} is an apocalyptic number.

1215413353520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215413353520 is an abundant number, since it is smaller than the sum of its proper divisors (1610422693600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215413353520 is a wasteful number, since it uses less digits than its factorization.

1215413353520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15192666932 (or 15192666926 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

Adding to 1215413353520 its reverse (253533145121), we get a palindrome (1468946498641).

The spelling of 1215413353520 in words is "one trillion, two hundred fifteen billion, four hundred thirteen million, three hundred fifty-three thousand, five hundred twenty".