7220518 has 8 divisors (see below), whose sum is σ = 10902960. Its totient is φ = 3586200.

The previous prime is 7220497. The next prime is 7220519. The reversal of 7220518 is 8150227.

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 = 7220492 and 7220501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220519) 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, 11653 + ... + 12256.

It is an arithmetic number, because the mean of its divisors is an integer number (1362870).

Almost surely, 2^7220518 is an apocalyptic number.

7220518 is a deficient number, since it is larger than the sum of its proper divisors (3682442).

7220518 is a wasteful number, since it uses less digits than its factorization.

7220518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24062.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 7220518 is about 2687.1021565992. The cubic root of 7220518 is about 193.2811280632.

The spelling of 7220518 in words is "seven million, two hundred twenty thousand, five hundred eighteen".