1215550032313 has 4 divisors (see below), whose sum is σ = 1216965108880. Its totient is φ = 1214134955748.

The previous prime is 1215550032299. The next prime is 1215550032337. The reversal of 1215550032313 is 3132300555121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1215550032313 - 2³⁷ = 1078111078841 is a prime.

It is a super-2 number, since 2×1215550032313² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215550032373) 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 3 ways as a sum of consecutive naturals, for example, 707536995 + ... + 707538712.

It is an arithmetic number, because the mean of its divisors is an integer number (304241277220).

Almost surely, 2^{1215550032313} is an apocalyptic number.

It is an amenable number.

1215550032313 is a deficient number, since it is larger than the sum of its proper divisors (1415076567).

1215550032313 is an equidigital number, since it uses as much as digits as its factorization.

1215550032313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415076566.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 1215550032313 its reverse (3132300555121), we get a palindrome (4347850587434).

The spelling of 1215550032313 in words is "one trillion, two hundred fifteen billion, five hundred fifty million, thirty-two thousand, three hundred thirteen".