1215034220 has 48 divisors (see below), whose sum is σ = 2608381440. Its totient is φ = 475310784.

The previous prime is 1215034193. The next prime is 1215034237. The reversal of 1215034220 is 224305121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1215034192 and 1215034201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165467 + ... + 172653.

It is an arithmetic number, because the mean of its divisors is an integer number (54341280).

Almost surely, 2^1215034220 is an apocalyptic number.

1215034220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215034220 is an abundant number, since it is smaller than the sum of its proper divisors (1393347220).

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

1215034220 is a wasteful number, since it uses less digits than its factorization.

1215034220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7382 (or 7380 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1215034220 is about 34857.3409771887. The cubic root of 1215034220 is about 1067.0780091039.

Adding to 1215034220 its reverse (224305121), we get a palindrome (1439339341).

The spelling of 1215034220 in words is "one billion, two hundred fifteen million, thirty-four thousand, two hundred twenty".