7212210 has 32 divisors (see below), whose sum is σ = 18221760. Its totient is φ = 1821888.

The previous prime is 7212209. The next prime is 7212211. The reversal of 7212210 is 122127.

It is an interprime number because it is at equal distance from previous prime (7212209) and next prime (7212211).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 7212210.

It is not an unprimeable number, because it can be changed into a prime (7212211) 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 15 ways as a sum of consecutive naturals, for example, 5757 + ... + 6896.

It is an arithmetic number, because the mean of its divisors is an integer number (569430).

Almost surely, 2^7212210 is an apocalyptic number.

7212210 is an abundant number, since it is smaller than the sum of its proper divisors (11009550).

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

7212210 is a wasteful number, since it uses less digits than its factorization.

7212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12682.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 7212210 is about 2685.5558083942. Note that the first 3 decimals coincide. The cubic root of 7212210 is about 193.2069692157.

Adding to 7212210 its reverse (122127), we get a palindrome (7334337).

The spelling of 7212210 in words is "seven million, two hundred twelve thousand, two hundred ten".