1215341213545 has 8 divisors (see below), whose sum is σ = 1460064863880. Its totient is φ = 971169365760.

The previous prime is 1215341213533. The next prime is 1215341213609. The reversal of 1215341213545 is 5453121435121.

It can be written as a sum of positive squares in 4 ways, for example, as 26790976 + 1215314422569 = 5176^2 + 1102413^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1215341213545 - 2¹⁹ = 1215340689257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137945790 + ... + 137954599.

It is an arithmetic number, because the mean of its divisors is an integer number (182508107985).

Almost surely, 2^{1215341213545} is an apocalyptic number.

It is an amenable number.

1215341213545 is a deficient number, since it is larger than the sum of its proper divisors (244723650335).

1215341213545 is an equidigital number, since it uses as much as digits as its factorization.

1215341213545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275901275.

The product of its digits is 72000, while the sum is 37.

Adding to 1215341213545 its reverse (5453121435121), we get a palindrome (6668462648666).

The spelling of 1215341213545 in words is "one trillion, two hundred fifteen billion, three hundred forty-one million, two hundred thirteen thousand, five hundred forty-five".