1215013000 has 64 divisors (see below), whose sum is σ = 2941239600. Its totient is φ = 469235200.

The previous prime is 1215012991. The next prime is 1215013021. The reversal of 1215013000 is 3105121.

It can be written as a sum of positive squares in 8 ways, for example, as 100922116 + 1114090884 = 10046^2 + 33378^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8052 + ... + 49948.

Almost surely, 2^1215013000 is an apocalyptic number.

1215013000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215013000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1470619800).

1215013000 is an abundant number, since it is smaller than the sum of its proper divisors (1726226600).

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

1215013000 is a wasteful number, since it uses less digits than its factorization.

1215013000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41947 (or 41933 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1215013000 is about 34857.0365923439. The cubic root of 1215013000 is about 1067.0717970629.

Adding to 1215013000 its reverse (3105121), we get a palindrome (1218118121).

It can be divided in two parts, 121 and 5013000, that added together give a square (5013121 = 2239²).

The spelling of 1215013000 in words is "one billion, two hundred fifteen million, thirteen thousand".