Search a number
-
+
7230161 = 31233231
BaseRepresentation
bin11011100101001011010001
3111121022220202
4123211023101
53322331121
6414544545
7115312121
oct33451321
914538822
107230161
114099144
122508155
131661c03
14d62c81
1597c40b
hex6e52d1

7230161 has 4 divisors (see below), whose sum is σ = 7463424. Its totient is φ = 6996900.

The previous prime is 7230137. The next prime is 7230163. The reversal of 7230161 is 1610327.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1610327 = 4333719.

It is a cyclic number.

It is not a de Polignac number, because 7230161 - 210 = 7229137 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7230163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116585 + ... + 116646.

It is an arithmetic number, because the mean of its divisors is an integer number (1865856).

Almost surely, 27230161 is an apocalyptic number.

It is an amenable number.

7230161 is a deficient number, since it is larger than the sum of its proper divisors (233263).

7230161 is a wasteful number, since it uses less digits than its factorization.

7230161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233262.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 7230161 is about 2688.8958700552. The cubic root of 7230161 is about 193.3671320880.

Adding to 7230161 its reverse (1610327), we get a palindrome (8840488).

The spelling of 7230161 in words is "seven million, two hundred thirty thousand, one hundred sixty-one".

Divisors: 1 31 233231 7230161