216714381 has 32 divisors (see below), whose sum is σ = 318181248. Its totient is φ = 130394880.

The previous prime is 216714373. The next prime is 216714389. The reversal of 216714381 is 183417612.

It is an interprime number because it is at equal distance from previous prime (216714373) and next prime (216714389).

It is not a de Polignac number, because 216714381 - 2³ = 216714373 is a prime.

It is a super-2 number, since 2×216714381² = 93930245864426322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216714389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 514551 + ... + 514971.

It is an arithmetic number, because the mean of its divisors is an integer number (9943164).

Almost surely, 2^216714381 is an apocalyptic number.

It is an amenable number.

216714381 is a deficient number, since it is larger than the sum of its proper divisors (101466867).

216714381 is a wasteful number, since it uses less digits than its factorization.

216714381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701.

The product of its digits is 8064, while the sum is 33.

The square root of 216714381 is about 14721.2221299728. Note that the first 3 decimals coincide. The cubic root of 216714381 is about 600.6607360017.

The spelling of 216714381 in words is "two hundred sixteen million, seven hundred fourteen thousand, three hundred eighty-one".