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227164381 is a prime number
BaseRepresentation
bin11011000101001…
…00000011011101
3120211110010221121
431202210003131
5431123230011
634312530541
75425602553
oct1542440335
9524403847
10227164381
11107256a64
12640b0a51
13380a86c2
1422253bd3
1514e22e71
hexd8a40dd

227164381 has 2 divisors, whose sum is σ = 227164382. Its totient is φ = 227164380.

The previous prime is 227164369. The next prime is 227164391. The reversal of 227164381 is 183461722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207504025 + 19660356 = 14405^2 + 4434^2 .

It is a cyclic number.

It is not a de Polignac number, because 227164381 - 211 = 227162333 is a prime.

It is a super-2 number, since 2×2271643812 = 103207311990226322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227164351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113582190 + 113582191.

It is an arithmetic number, because the mean of its divisors is an integer number (113582191).

Almost surely, 2227164381 is an apocalyptic number.

It is an amenable number.

227164381 is a deficient number, since it is larger than the sum of its proper divisors (1).

227164381 is an equidigital number, since it uses as much as digits as its factorization.

227164381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 227164381 is about 15071.9733611760. The cubic root of 227164381 is about 610.1642315120.

The spelling of 227164381 in words is "two hundred twenty-seven million, one hundred sixty-four thousand, three hundred eighty-one".