216741340 has 24 divisors (see below), whose sum is σ = 459415152. Its totient is φ = 85885440.

The previous prime is 216741337. The next prime is 216741353. The reversal of 216741340 is 43147612.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 216741299 and 216741308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48501 + ... + 52780.

It is an arithmetic number, because the mean of its divisors is an integer number (19142298).

Almost surely, 2^216741340 is an apocalyptic number.

216741340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216741340 is an abundant number, since it is smaller than the sum of its proper divisors (242673812).

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

216741340 is a wasteful number, since it uses less digits than its factorization.

216741340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101397 (or 101395 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 216741340 is about 14722.1377523782. The cubic root of 216741340 is about 600.6856421190.

Adding to 216741340 its reverse (43147612), we get a palindrome (259888952).

The spelling of 216741340 in words is "two hundred sixteen million, seven hundred forty-one thousand, three hundred forty".