1215565030 has 16 divisors (see below), whose sum is σ = 2194925040. Its totient is φ = 484690912.

The previous prime is 1215565027. The next prime is 1215565037. The reversal of 1215565030 is 305655121.

It is a self number, because there is not a number n which added to its sum of digits gives 1215565030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215565037) 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 7 ways as a sum of consecutive naturals, for example, 188560 + ... + 194899.

It is an arithmetic number, because the mean of its divisors is an integer number (137182815).

Almost surely, 2^1215565030 is an apocalyptic number.

1215565030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215565030 is a deficient number, since it is larger than the sum of its proper divisors (979360010).

1215565030 is a wasteful number, since it uses less digits than its factorization.

1215565030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383783.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1215565030 is about 34864.9541803800. The cubic root of 1215565030 is about 1067.2333773522.

Subtracting from 1215565030 its reverse (305655121), we obtain a palindrome (909909909).

The spelling of 1215565030 in words is "one billion, two hundred fifteen million, five hundred sixty-five thousand, thirty".