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30561222 = 235093537
BaseRepresentation
bin111010010010…
…1001111000110
32010111200010010
41310211033012
530310424342
63011011050
7520523526
oct164451706
963450103
1030561222
111628410a
12a299a86
136440583
1440b7686
152a3a29c
hex1d253c6

30561222 has 8 divisors (see below), whose sum is σ = 61122456. Its totient is φ = 10187072.

The previous prime is 30561217. The next prime is 30561239. The reversal of 30561222 is 22216503.

It is a sphenic number, since it is the product of 3 distinct primes.

30561222 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2546763 + ... + 2546774.

It is an arithmetic number, because the mean of its divisors is an integer number (7640307).

Almost surely, 230561222 is an apocalyptic number.

30561222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30561222 is a wasteful number, since it uses less digits than its factorization.

30561222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5093542.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 30561222 is about 5528.2205093502. The cubic root of 30561222 is about 312.6489001341.

Adding to 30561222 its reverse (22216503), we get a palindrome (52777725).

It can be divided in two parts, 3056 and 1222, that added together give a triangular number (4278 = T92).

The spelling of 30561222 in words is "thirty million, five hundred sixty-one thousand, two hundred twenty-two".

Divisors: 1 2 3 6 5093537 10187074 15280611 30561222