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30011431 = 1914910601
BaseRepresentation
bin111001001111…
…1000000100111
32002110201221111
41302133000213
530140331211
62551125451
7513043612
oct162370047
962421844
1030011431
1115a3903a
12a073887
1362aa258
143db3179
15297c421
hex1c9f027

30011431 has 8 divisors (see below), whose sum is σ = 31806000. Its totient is φ = 28238400.

The previous prime is 30011417. The next prime is 30011447. The reversal of 30011431 is 13411003.

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 30011431 - 217 = 29880359 is a prime.

It is a super-2 number, since 2×300114312 = 1801371981335522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30011461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2470 + ... + 8131.

It is an arithmetic number, because the mean of its divisors is an integer number (3975750).

Almost surely, 230011431 is an apocalyptic number.

30011431 is a deficient number, since it is larger than the sum of its proper divisors (1794569).

30011431 is a wasteful number, since it uses less digits than its factorization.

30011431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10769.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 30011431 is about 5478.2689784274. The cubic root of 30011431 is about 310.7627108892.

Adding to 30011431 its reverse (13411003), we get a palindrome (43422434).

The spelling of 30011431 in words is "thirty million, eleven thousand, four hundred thirty-one".

Divisors: 1 19 149 2831 10601 201419 1579549 30011431