1311472216 has 8 divisors (see below), whose sum is σ = 2459010420. Its totient is φ = 655736104.

The previous prime is 1311472199. The next prime is 1311472219. The reversal of 1311472216 is 6122741131.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311472219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81967006 + ... + 81967021.

Almost surely, 2^1311472216 is an apocalyptic number.

It is an amenable number.

1311472216 is a deficient number, since it is larger than the sum of its proper divisors (1147538204).

1311472216 is a wasteful number, since it uses less digits than its factorization.

1311472216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163934033 (or 163934029 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 1311472216 is about 36214.2543206401. The cubic root of 1311472216 is about 1094.5939198841.

The spelling of 1311472216 in words is "one billion, three hundred eleven million, four hundred seventy-two thousand, two hundred sixteen".