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305213042 = 2316018191
BaseRepresentation
bin10010001100010…
…010111001110010
3210021022102120202
4102030102321302
51111113304132
650141435202
710364160641
oct2214227162
9707272522
10305213042
11147315092
128626bb02
134b304844
142c76d358
151bbdd762
hex12312e72

305213042 has 16 divisors (see below), whose sum is σ = 473432064. Its totient is φ = 147420000.

The previous prime is 305213033. The next prime is 305213047. The reversal of 305213042 is 240312503.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (305213047) 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 in 7 ways as a sum of consecutive naturals, for example, 33167 + ... + 41357.

It is an arithmetic number, because the mean of its divisors is an integer number (29589504).

Almost surely, 2305213042 is an apocalyptic number.

305213042 is a deficient number, since it is larger than the sum of its proper divisors (168219022).

305213042 is a wasteful number, since it uses less digits than its factorization.

305213042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8825.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 305213042 is about 17470.3475065609. The cubic root of 305213042 is about 673.2882403441.

Adding to 305213042 its reverse (240312503), we get a palindrome (545525545).

The spelling of 305213042 in words is "three hundred five million, two hundred thirteen thousand, forty-two".

Divisors: 1 2 31 62 601 1202 8191 16382 18631 37262 253921 507842 4922791 9845582 152606521 305213042