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30233215 = 531195053
BaseRepresentation
bin111001101010…
…1001001111111
32002220000011201
41303111021333
530214430330
63000000331
7514656325
oct163251177
962800151
1030233215
111607a731
12a1600a7
13635719c
14402dd15
1529c2eca
hex1cd527f

30233215 has 8 divisors (see below), whose sum is σ = 37450368. Its totient is φ = 23406240.

The previous prime is 30233213. The next prime is 30233219. The reversal of 30233215 is 51233203.

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

It is not a de Polignac number, because 30233215 - 21 = 30233213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30233192 and 30233201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30233213) 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, 97372 + ... + 97681.

It is an arithmetic number, because the mean of its divisors is an integer number (4681296).

Almost surely, 230233215 is an apocalyptic number.

30233215 is a deficient number, since it is larger than the sum of its proper divisors (7217153).

30233215 is a wasteful number, since it uses less digits than its factorization.

30233215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195089.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 30233215 is about 5498.4738791777. The cubic root of 30233215 is about 311.5263433943.

Adding to 30233215 its reverse (51233203), we get a palindrome (81466418).

The spelling of 30233215 in words is "thirty million, two hundred thirty-three thousand, two hundred fifteen".

Divisors: 1 5 31 155 195053 975265 6046643 30233215