1340216505 has 48 divisors (see below), whose sum is σ = 2485186704. Its totient is φ = 665763840.

The previous prime is 1340216483. The next prime is 1340216513. The reversal of 1340216505 is 5056120431.

1340216505 is a `hidden beast` number, since 1 + 3 + 4 + 0 + 2 + 1 + 650 + 5 = 666.

1340216505 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 63154809 + 1277061696 = 7947^2 + 35736^2 .

It is not a de Polignac number, because 1340216505 - 2⁵ = 1340216473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65175 + ... + 83235.

It is an arithmetic number, because the mean of its divisors is an integer number (51774723).

Almost surely, 2^1340216505 is an apocalyptic number.

1340216505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1340216505 is a deficient number, since it is larger than the sum of its proper divisors (1144970199).

1340216505 is a wasteful number, since it uses less digits than its factorization.

1340216505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18186 (or 18183 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1340216505 is about 36608.9675489490. The cubic root of 1340216505 is about 1102.5331441437.

Adding to 1340216505 its reverse (5056120431), we get a palindrome (6396336936).

The spelling of 1340216505 in words is "one billion, three hundred forty million, two hundred sixteen thousand, five hundred five".