216124117 has 4 divisors (see below), whose sum is σ = 235771776. Its totient is φ = 196476460.

The previous prime is 216124109. The next prime is 216124127. The reversal of 216124117 is 711421612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216124117 - 2³ = 216124109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216124091 and 216124100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216124127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9823813 + ... + 9823834.

It is an arithmetic number, because the mean of its divisors is an integer number (58942944).

Almost surely, 2^216124117 is an apocalyptic number.

It is an amenable number.

216124117 is a deficient number, since it is larger than the sum of its proper divisors (19647659).

216124117 is a wasteful number, since it uses less digits than its factorization.

216124117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19647658.

The product of its digits is 672, while the sum is 25.

The square root of 216124117 is about 14701.1603963769. The cubic root of 216124117 is about 600.1149011430.

Adding to 216124117 its reverse (711421612), we get a palindrome (927545729).

The spelling of 216124117 in words is "two hundred sixteen million, one hundred twenty-four thousand, one hundred seventeen".