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BaseRepresentation
bin111011100111100…
…011001011000111
32120201002121121021
4323213203023013
54022024122211
6243130132011
733533521204
oct7347431307
92521077537
101000223431
11473666739
1223ab81007
1312c2b7aac
1496ba8cab
155cc27771
hex3b9e32c7

1000223431 has 2 divisors, whose sum is σ = 1000223432. Its totient is φ = 1000223430.

The previous prime is 1000223429. The next prime is 1000223447. The reversal of 1000223431 is 1343220001.

Adding to 1000223431 its reverse (1343220001), we get a palindrome (2343443432).

It can be divided in two parts, 10002 and 23431, that added together give a palindrome (33433).

It is a happy number.

It is an a-pointer prime, because the next prime (1000223447) can be obtained adding 1000223431 to its sum of digits (16).

It is a weak prime.

It is an emirp because it is prime and its reverse (1343220001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000223431 - 21 = 1000223429 is a prime.

It is a super-2 number, since 2×10002234312 = 2000893823842823522, which contains 22 as substring.

Together with 1000223429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000223831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500111715 + 500111716.

It is an arithmetic number, because the mean of its divisors is an integer number (500111716).

Almost surely, 21000223431 is an apocalyptic number.

1000223431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000223431 is an equidigital number, since it uses as much as digits as its factorization.

1000223431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1000223431 is about 31626.3091586736. The cubic root of 1000223431 is about 1000.0744714539.

The spelling of 1000223431 in words is "one billion, two hundred twenty-three thousand, four hundred thirty-one".