2117540406 has 8 divisors (see below), whose sum is σ = 4235080824. Its totient is φ = 705846800.

The previous prime is 2117540389. The next prime is 2117540413. The reversal of 2117540406 is 6040457112.

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

2117540406 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176461695 + ... + 176461706.

It is an arithmetic number, because the mean of its divisors is an integer number (529385103).

Almost surely, 2^2117540406 is an apocalyptic number.

2117540406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2117540406 is a wasteful number, since it uses less digits than its factorization.

2117540406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352923406.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2117540406 is about 46016.7404973451. The cubic root of 2117540406 is about 1284.1346616368.

Adding to 2117540406 its reverse (6040457112), we get a palindrome (8157997518).

The spelling of 2117540406 in words is "two billion, one hundred seventeen million, five hundred forty thousand, four hundred six".