1215738050 has 18 divisors (see below), whose sum is σ = 2261731449. Its totient is φ = 486196600.

The previous prime is 1215738037. The next prime is 1215738053. The reversal of 1215738050 is 508375121.

It can be written as a sum of positive squares in 2 ways, for example, as 1191423289 + 24314761 = 34517^2 + 4931^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24655.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1215737998 and 1215738016.

It is not an unprimeable number, because it can be changed into a prime (1215738053) 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 8 ways as a sum of consecutive naturals, for example, 244085 + ... + 249015.

Almost surely, 2^1215738050 is an apocalyptic number.

1215738050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215738050 is a deficient number, since it is larger than the sum of its proper divisors (1045993399).

1215738050 is an frugal number, since it uses more digits than its factorization.

1215738050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9874 (or 4938 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 1215738050 is about 34867.4353803087. The cubic root of 1215738050 is about 1067.2840105842.

Multiplying 1215738050 by its sum of digits (32), we get a square (38903617600 = 197240²).

The spelling of 1215738050 in words is "one billion, two hundred fifteen million, seven hundred thirty-eight thousand, fifty".