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216970 = 25131669
BaseRepresentation
bin110100111110001010
3102000121221
4310332022
523420340
64352254
71562365
oct647612
9360557
10216970
11139016
12a568a
13779b0
14590dc
154444a
hex34f8a

216970 has 16 divisors (see below), whose sum is σ = 420840. Its totient is φ = 80064.

The previous prime is 216967. The next prime is 216973. The reversal of 216970 is 79612.

216970 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (216967) and next prime (216973).

It can be written as a sum of positive squares in 4 ways, for example, as 139129 + 77841 = 373^2 + 279^2 .

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216973) 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, 705 + ... + 964.

2216970 is an apocalyptic number.

216970 is a deficient number, since it is larger than the sum of its proper divisors (203870).

216970 is a wasteful number, since it uses less digits than its factorization.

216970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 216970 is about 465.8003864318. The cubic root of 216970 is about 60.0896807042.

The spelling of 216970 in words is "two hundred sixteen thousand, nine hundred seventy".