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30204031 = 1113211217
BaseRepresentation
bin111001100111…
…0000001111111
32002211112010211
41303032001333
530213012111
62555213251
7514505254
oct163160177
962745124
1030204031
111605a810
12a147227
136346b10
14402342b
1529b9521
hex1cce07f

30204031 has 8 divisors (see below), whose sum is σ = 35484624. Its totient is φ = 25345920.

The previous prime is 30203989. The next prime is 30204059. The reversal of 30204031 is 13040203.

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

It is a cyclic number.

It is not a de Polignac number, because 30204031 - 27 = 30203903 is a prime.

It is a super-2 number, since 2×302040312 = 1824566977297922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30204071) 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, 105466 + ... + 105751.

It is an arithmetic number, because the mean of its divisors is an integer number (4435578).

Almost surely, 230204031 is an apocalyptic number.

30204031 is a deficient number, since it is larger than the sum of its proper divisors (5280593).

30204031 is a wasteful number, since it uses less digits than its factorization.

30204031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211241.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30204031 is about 5495.8194111524. The cubic root of 30204031 is about 311.4260727512.

Adding to 30204031 its reverse (13040203), we get a palindrome (43244234).

The spelling of 30204031 in words is "thirty million, two hundred four thousand, thirty-one".

Divisors: 1 11 13 143 211217 2323387 2745821 30204031