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2730181 is a prime number
BaseRepresentation
bin1010011010100011000101
312010201002211
422122203011
51144331211
6134303421
732130466
oct12324305
95121084
102730181
1115a5253
12ab7b71
137478bc
14510d6d
1538de21
hex29a8c5

2730181 has 2 divisors, whose sum is σ = 2730182. Its totient is φ = 2730180.

The previous prime is 2730179. The next prime is 2730191. The reversal of 2730181 is 1810372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1779556 + 950625 = 1334^2 + 975^2 .

It is a cyclic number.

It is not a de Polignac number, because 2730181 - 21 = 2730179 is a prime.

It is a super-2 number, since 2×27301812 = 14907776585522, which contains 22 as substring.

Together with 2730179, 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 (2730121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365090 + 1365091.

It is an arithmetic number, because the mean of its divisors is an integer number (1365091).

22730181 is an apocalyptic number.

It is an amenable number.

2730181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2730181 is an equidigital number, since it uses as much as digits as its factorization.

2730181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 2730181 is about 1652.3259363697. The cubic root of 2730181 is about 139.7645873643.

The spelling of 2730181 in words is "two million, seven hundred thirty thousand, one hundred eighty-one".