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30533205 = 355213907
BaseRepresentation
bin111010001111…
…0011001010101
32010110020200110
41310132121111
530304030310
63010233233
7520346043
oct164363125
963406613
1030533205
111626505a
12a285819
1364308b1
1440ab393
152a31d20
hex1d1e655

30533205 has 16 divisors (see below), whose sum is σ = 48959424. Its totient is φ = 16248960.

The previous prime is 30533197. The next prime is 30533219. The reversal of 30533205 is 50233503.

30533205 is a nontrivial binomial coefficient, being equal to C(7815, 2).

It is not a de Polignac number, because 30533205 - 23 = 30533197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5862 + ... + 9768.

It is an arithmetic number, because the mean of its divisors is an integer number (3059964).

Almost surely, 230533205 is an apocalyptic number.

30533205 is the 7814-th triangular number.

It is an amenable number.

30533205 is a deficient number, since it is larger than the sum of its proper divisors (18426219).

30533205 is a wasteful number, since it uses less digits than its factorization.

30533205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436.

The product of its (nonzero) digits is 1350, while the sum is 21.

The square root of 30533205 is about 5525.6859302715. The cubic root of 30533205 is about 312.5533306315.

Adding to 30533205 its reverse (50233503), we get a palindrome (80766708).

The spelling of 30533205 in words is "thirty million, five hundred thirty-three thousand, two hundred five".

Divisors: 1 3 5 15 521 1563 2605 3907 7815 11721 19535 58605 2035547 6106641 10177735 30533205