216140061 has 8 divisors (see below), whose sum is σ = 288439200. Its totient is φ = 143967152.

The previous prime is 216140033. The next prime is 216140063. The reversal of 216140061 is 160041612.

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

It is a cyclic number.

It is not a de Polignac number, because 216140061 - 2¹⁹ = 215615773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216140063) 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, 27486 + ... + 34463.

It is an arithmetic number, because the mean of its divisors is an integer number (36054900).

Almost surely, 2^216140061 is an apocalyptic number.

It is an amenable number.

216140061 is a deficient number, since it is larger than the sum of its proper divisors (72299139).

216140061 is a wasteful number, since it uses less digits than its factorization.

216140061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63115.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 216140061 is about 14701.7026564953. The cubic root of 216140061 is about 600.1296580904.

Adding to 216140061 its reverse (160041612), we get a palindrome (376181673).

The spelling of 216140061 in words is "two hundred sixteen million, one hundred forty thousand, sixty-one".