1216726303 has 8 divisors (see below), whose sum is σ = 1312509296. Its totient is φ = 1121256000.

The previous prime is 1216726283. The next prime is 1216726307. The reversal of 1216726303 is 3036276121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216726303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216726307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70053 + ... + 85678.

It is an arithmetic number, because the mean of its divisors is an integer number (164063662).

Almost surely, 2^1216726303 is an apocalyptic number.

1216726303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1216726303 is a deficient number, since it is larger than the sum of its proper divisors (95782993).

1216726303 is a wasteful number, since it uses less digits than its factorization.

1216726303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156345.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 1216726303 is about 34881.6040772210. The cubic root of 1216726303 is about 1067.5731246630.

The spelling of 1216726303 in words is "one billion, two hundred sixteen million, seven hundred twenty-six thousand, three hundred three".