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30302221 = 318311777
BaseRepresentation
bin111001110011…
…0000000001101
32010000111211111
41303212000031
530224132341
63001252021
7515364445
oct163460015
963014744
1030302221
1116117564
12a194011
13637c711
14404b125
1529d8681
hex1ce600d

30302221 has 8 divisors (see below), whose sum is σ = 31659264. Its totient is φ = 28968960.

The previous prime is 30302219. The next prime is 30302249. The reversal of 30302221 is 12220303.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 30302221 - 21 = 30302219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30302281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3316 + ... + 8461.

It is an arithmetic number, because the mean of its divisors is an integer number (3957408).

Almost surely, 230302221 is an apocalyptic number.

30302221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30302221 is a deficient number, since it is larger than the sum of its proper divisors (1357043).

30302221 is a wasteful number, since it uses less digits than its factorization.

30302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11891.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30302221 is about 5504.7453165428. The cubic root of 30302221 is about 311.7631784127.

Adding to 30302221 its reverse (12220303), we get a palindrome (42522524).

The spelling of 30302221 in words is "thirty million, three hundred two thousand, two hundred twenty-one".

Divisors: 1 31 83 2573 11777 365087 977491 30302221