7220919 has 8 divisors (see below), whose sum is σ = 10046592. Its totient is φ = 4604600.

The previous prime is 7220897. The next prime is 7220921. The reversal of 7220919 is 9190227.

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

It is not a de Polignac number, because 7220919 - 2⁹ = 7220407 is a prime.

It is a super-2 number, since 2×7220919² = 104283342409122, which contains 22 as substring.

7220919 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52257 + ... + 52394.

It is an arithmetic number, because the mean of its divisors is an integer number (1255824).

Almost surely, 2^7220919 is an apocalyptic number.

7220919 is a deficient number, since it is larger than the sum of its proper divisors (2825673).

7220919 is a wasteful number, since it uses less digits than its factorization.

7220919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104677.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 7220919 is about 2687.1767712601. The cubic root of 7220919 is about 193.2847060289.

The spelling of 7220919 in words is "seven million, two hundred twenty thousand, nine hundred nineteen".