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216731030 = 2521673103
BaseRepresentation
bin11001110101100…
…00110110010110
3120002211002002012
430322300312112
5420440343110
633301144222
75241116615
oct1472606626
9502732065
10216731030
1110138025a
12606bb072
1335b94819
1420ad987c
1514061905
hexceb0d96

216731030 has 8 divisors (see below), whose sum is σ = 390115872. Its totient is φ = 86692408.

The previous prime is 216731023. The next prime is 216731033. The reversal of 216731030 is 30137612.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 216730987 and 216731005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216731033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10836542 + ... + 10836561.

It is an arithmetic number, because the mean of its divisors is an integer number (48764484).

Almost surely, 2216731030 is an apocalyptic number.

216731030 is a deficient number, since it is larger than the sum of its proper divisors (173384842).

216731030 is a wasteful number, since it uses less digits than its factorization.

216731030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21673110.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 216731030 is about 14721.7875952617. The cubic root of 216731030 is about 600.6761174521.

Adding to 216731030 its reverse (30137612), we get a palindrome (246868642).

The spelling of 216731030 in words is "two hundred sixteen million, seven hundred thirty-one thousand, thirty".

Divisors: 1 2 5 10 21673103 43346206 108365515 216731030