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4021030031 is a prime number
BaseRepresentation
bin1110111110101100…
…0000110010001111
3101101020021111020012
43233223000302033
531213340430111
61503000343435
7201434122424
oct35753006217
911336244205
104021030031
111783848417
12942774b7b
134c10a5915
142a2069d4b
1518802b48b
hexefac0c8f

4021030031 has 2 divisors, whose sum is σ = 4021030032. Its totient is φ = 4021030030.

The previous prime is 4021029997. The next prime is 4021030033. The reversal of 4021030031 is 1300301204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4021030031 - 210 = 4021029007 is a prime.

It is a super-2 number, since 2×40210300312 = 32337365020407721922, which contains 22 as substring.

Together with 4021030033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4021029988 and 4021030015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021030033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010515015 + 2010515016.

It is an arithmetic number, because the mean of its divisors is an integer number (2010515016).

Almost surely, 24021030031 is an apocalyptic number.

4021030031 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021030031 is an equidigital number, since it uses as much as digits as its factorization.

4021030031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 4021030031 is about 63411.5922446362. The cubic root of 4021030031 is about 1590.1781152731.

Adding to 4021030031 its reverse (1300301204), we get a palindrome (5321331235).

The spelling of 4021030031 in words is "four billion, twenty-one million, thirty thousand, thirty-one".