12511222 has 8 divisors (see below), whose sum is σ = 19074672. Its totient is φ = 6153000.

The previous prime is 12511211. The next prime is 12511229. The reversal of 12511222 is 22211521.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 12511196 and 12511205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511229) 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, 51154 + ... + 51397.

It is an arithmetic number, because the mean of its divisors is an integer number (2384334).

Almost surely, 2^12511222 is an apocalyptic number.

12511222 is a deficient number, since it is larger than the sum of its proper divisors (6563450).

12511222 is a wasteful number, since it uses less digits than its factorization.

12511222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102614.

The product of its digits is 80, while the sum is 16.

The square root of 12511222 is about 3537.1205803591. The cubic root of 12511222 is about 232.1488714542.

Adding to 12511222 its reverse (22211521), we get a palindrome (34722743).

The spelling of 12511222 in words is "twelve million, five hundred eleven thousand, two hundred twenty-two".