216380461 has 8 divisors (see below), whose sum is σ = 237240000. Its totient is φ = 195719040.

The previous prime is 216380407. The next prime is 216380491. The reversal of 216380461 is 164083612.

It is a happy number.

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

It is not a de Polignac number, because 216380461 - 2¹³ = 216372269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216380401) 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, 47236 + ... + 51613.

It is an arithmetic number, because the mean of its divisors is an integer number (29655000).

Almost surely, 2^216380461 is an apocalyptic number.

It is an amenable number.

216380461 is a deficient number, since it is larger than the sum of its proper divisors (20859539).

216380461 is a wasteful number, since it uses less digits than its factorization.

216380461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99059.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 216380461 is about 14709.8763081135. The cubic root of 216380461 is about 600.3520720721.

The spelling of 216380461 in words is "two hundred sixteen million, three hundred eighty thousand, four hundred sixty-one".