Search a number
-
+
30211222 = 215105611
BaseRepresentation
bin111001100111…
…1110010010110
32002211220000011
41303033302112
530213224342
62555310434
7514535236
oct163176226
962756004
1030211222
1116065158
12a14b41a
13634a182
144025cc6
1529bb717
hex1ccfc96

30211222 has 4 divisors (see below), whose sum is σ = 45316836. Its totient is φ = 15105610.

The previous prime is 30211217. The next prime is 30211229. The reversal of 30211222 is 22211203.

30211222 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22211203 = 73173029.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30211229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7552804 + ... + 7552807.

It is an arithmetic number, because the mean of its divisors is an integer number (11329209).

Almost surely, 230211222 is an apocalyptic number.

30211222 is a deficient number, since it is larger than the sum of its proper divisors (15105614).

30211222 is a wasteful number, since it uses less digits than its factorization.

30211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15105613.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 30211222 is about 5496.4735967709. The cubic root of 30211222 is about 311.4507856467.

Adding to 30211222 its reverse (22211203), we get a palindrome (52422425).

The spelling of 30211222 in words is "thirty million, two hundred eleven thousand, two hundred twenty-two".

Divisors: 1 2 15105611 30211222