1215323530 has 8 divisors (see below), whose sum is σ = 2187582372. Its totient is φ = 486129408.

The previous prime is 1215323479. The next prime is 1215323531. The reversal of 1215323530 is 353235121.

It can be written as a sum of positive squares in 2 ways, for example, as 1210274521 + 5049009 = 34789^2 + 2247^2 .

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

It is a super-2 number, since 2×1215323530² = 2954022565143321800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1215323495 and 1215323504.

It is not an unprimeable number, because it can be changed into a prime (1215323531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60766167 + ... + 60766186.

Almost surely, 2^1215323530 is an apocalyptic number.

1215323530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215323530 is a deficient number, since it is larger than the sum of its proper divisors (972258842).

1215323530 is a wasteful number, since it uses less digits than its factorization.

1215323530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121532360.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 1215323530 is about 34861.4906451230. The cubic root of 1215323530 is about 1067.1626958379.

Adding to 1215323530 its reverse (353235121), we get a palindrome (1568558651).

The spelling of 1215323530 in words is "one billion, two hundred fifteen million, three hundred twenty-three thousand, five hundred thirty".