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70303231 is a prime number
BaseRepresentation
bin1000011000010…
…11110111111111
311220021202220101
410030023313333
5120444200411
610550501531
71512365455
oct414136777
9156252811
1070303231
1136758949
121b6648a7
131174685b
1494a09d5
15628a8c1
hex430bdff

70303231 has 2 divisors, whose sum is σ = 70303232. Its totient is φ = 70303230.

The previous prime is 70303223. The next prime is 70303267. The reversal of 70303231 is 13230307.

It is a weak prime.

It is an emirp because it is prime and its reverse (13230307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70303231 - 23 = 70303223 is a prime.

It is a super-2 number, since 2×703032312 = 9885088578078722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70303199 and 70303208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70303201) 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 as a sum of consecutive naturals, namely, 35151615 + 35151616.

It is an arithmetic number, because the mean of its divisors is an integer number (35151616).

Almost surely, 270303231 is an apocalyptic number.

70303231 is a deficient number, since it is larger than the sum of its proper divisors (1).

70303231 is an equidigital number, since it uses as much as digits as its factorization.

70303231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 70303231 is about 8384.7022010325. The cubic root of 70303231 is about 412.7227686845.

Adding to 70303231 its reverse (13230307), we get a palindrome (83533538).

The spelling of 70303231 in words is "seventy million, three hundred three thousand, two hundred thirty-one".