7812229 has 4 divisors (see below), whose sum is σ = 7837984. Its totient is φ = 7786476.

The previous prime is 7812227. The next prime is 7812239. The reversal of 7812229 is 9222187.

7812229 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7812229 - 2¹ = 7812227 is a prime.

It is a super-2 number, since 2×7812229² = 122061843896882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7812229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7812221) 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, 12417 + ... + 13030.

It is an arithmetic number, because the mean of its divisors is an integer number (1959496).

Almost surely, 2^7812229 is an apocalyptic number.

It is an amenable number.

7812229 is a deficient number, since it is larger than the sum of its proper divisors (25755).

7812229 is a wasteful number, since it uses less digits than its factorization.

7812229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25754.

The product of its digits is 4032, while the sum is 31.

The square root of 7812229 is about 2795.0364935006. The cubic root of 7812229 is about 198.4228371458.

The spelling of 7812229 in words is "seven million, eight hundred twelve thousand, two hundred twenty-nine".