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30203131 = 76764399
BaseRepresentation
bin111001100110…
…1110011111011
32002211110220111
41303031303323
530213000011
62555205151
7514502530
oct163156373
962743814
1030203131
111605a072
12a1467b7
13634659a
144022d87
1529b9121
hex1ccdcfb

30203131 has 8 divisors (see below), whose sum is σ = 35033600. Its totient is φ = 25501608.

The previous prime is 30203099. The next prime is 30203153. The reversal of 30203131 is 13130203.

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 30203131 - 25 = 30203099 is a prime.

It is a super-2 number, since 2×302031312 = 1824458244406322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30203191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31731 + ... + 32668.

It is an arithmetic number, because the mean of its divisors is an integer number (4379200).

Almost surely, 230203131 is an apocalyptic number.

30203131 is a deficient number, since it is larger than the sum of its proper divisors (4830469).

30203131 is an equidigital number, since it uses as much as digits as its factorization.

30203131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64473.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 30203131 is about 5495.7375301228. The cubic root of 30203131 is about 311.4229794969.

Adding to 30203131 its reverse (13130203), we get a palindrome (43333334).

It can be divided in two parts, 30203 and 131, that multiplied together give a palindrome (3956593).

The spelling of 30203131 in words is "thirty million, two hundred three thousand, one hundred thirty-one".

Divisors: 1 7 67 469 64399 450793 4314733 30203131