7220351 has 4 divisors (see below), whose sum is σ = 7226232. Its totient is φ = 7214472.

The previous prime is 7220347. The next prime is 7220371. The reversal of 7220351 is 1530227.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7220351 - 2² = 7220347 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 (7220371) 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, 320 + ... + 3813.

It is an arithmetic number, because the mean of its divisors is an integer number (1806558).

Almost surely, 2^7220351 is an apocalyptic number.

7220351 is a deficient number, since it is larger than the sum of its proper divisors (5881).

7220351 is a wasteful number, since it uses less digits than its factorization.

7220351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5880.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 7220351 is about 2687.0710820520. The cubic root of 7220351 is about 193.2796379487.

Adding to 7220351 its reverse (1530227), we get a palindrome (8750578).

The spelling of 7220351 in words is "seven million, two hundred twenty thousand, three hundred fifty-one".