1216360503 has 16 divisors (see below), whose sum is σ = 1820596960. Its totient is φ = 802545408.

The previous prime is 1216360477. The next prime is 1216360507. The reversal of 1216360503 is 3050636121.

1216360503 is a `hidden beast` number, since 1 + 21 + 636 + 0 + 5 + 0 + 3 = 666.

It is not a de Polignac number, because 1216360503 - 2⁵ = 1216360471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216360507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229600 + ... + 234837.

It is an arithmetic number, because the mean of its divisors is an integer number (113787310).

Almost surely, 2^1216360503 is an apocalyptic number.

1216360503 is a deficient number, since it is larger than the sum of its proper divisors (604236457).

1216360503 is an equidigital number, since it uses as much as digits as its factorization.

1216360503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464543 (or 464537 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1216360503 is about 34876.3602315379. The cubic root of 1216360503 is about 1067.4661278826.

Adding to 1216360503 its reverse (3050636121), we get a palindrome (4266996624).

The spelling of 1216360503 in words is "one billion, two hundred sixteen million, three hundred sixty thousand, five hundred three".