Base | Representation |
---|---|
bin | 1000100111100… |
… | …10001001110111 |
3 | 12001000222010202 |
4 | 10103302021313 |
5 | 122001420111 |
6 | 11101311115 |
7 | 1535332454 |
oct | 423621167 |
9 | 161028122 |
10 | 72295031 |
11 | 37899366 |
12 | 2026549b |
13 | 11c93333 |
14 | 985c82b |
15 | 6530b3b |
hex | 44f2277 |
72295031 has 2 divisors, whose sum is σ = 72295032. Its totient is φ = 72295030.
The previous prime is 72294983. The next prime is 72295063. The reversal of 72295031 is 13059227.
It is a strong prime.
It is an emirp because it is prime and its reverse (13059227) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 72295031 - 210 = 72294007 is a prime.
It is a super-2 number, since 2×722950312 = 10453143014581922, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 72294985 and 72295003.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (72295081) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36147515 + 36147516.
It is an arithmetic number, because the mean of its divisors is an integer number (36147516).
Almost surely, 272295031 is an apocalyptic number.
72295031 is the 3803-rd centered decagonal number.
72295031 is a deficient number, since it is larger than the sum of its proper divisors (1).
72295031 is an equidigital number, since it uses as much as digits as its factorization.
72295031 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 3780, while the sum is 29.
The square root of 72295031 is about 8502.6484697416. The cubic root of 72295031 is about 416.5842209854.
The spelling of 72295031 in words is "seventy-two million, two hundred ninety-five thousand, thirty-one".
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