216276461 has 8 divisors (see below), whose sum is σ = 224124600. Its totient is φ = 208454400.

The previous prime is 216276421. The next prime is 216276493. The reversal of 216276461 is 164672612.

It can be written as a sum of positive squares in 4 ways, for example, as 16760836 + 199515625 = 4094^2 + 14125^2 .

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 216276461 - 2¹⁸ = 216014317 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 (216276421) 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, 11225 + ... + 23633.

It is an arithmetic number, because the mean of its divisors is an integer number (28015575).

Almost surely, 2^216276461 is an apocalyptic number.

It is an amenable number.

216276461 is a deficient number, since it is larger than the sum of its proper divisors (7848139).

216276461 is a wasteful number, since it uses less digits than its factorization.

216276461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13039.

The product of its digits is 24192, while the sum is 35.

The square root of 216276461 is about 14706.3408433233. The cubic root of 216276461 is about 600.2558732733.

The spelling of 216276461 in words is "two hundred sixteen million, two hundred seventy-six thousand, four hundred sixty-one".