7218473 has 4 divisors (see below), whose sum is σ = 7340880. Its totient is φ = 7096068.

The previous prime is 7218469. The next prime is 7218479. The reversal of 7218473 is 3748127.

It is a happy number.

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 7218473 - 2² = 7218469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7218479) 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 3 ways as a sum of consecutive naturals, for example, 61115 + ... + 61232.

It is an arithmetic number, because the mean of its divisors is an integer number (1835220).

Almost surely, 2^7218473 is an apocalyptic number.

It is an amenable number.

7218473 is a deficient number, since it is larger than the sum of its proper divisors (122407).

7218473 is a wasteful number, since it uses less digits than its factorization.

7218473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122406.

The product of its digits is 9408, while the sum is 32.

The square root of 7218473 is about 2686.7216082058. The cubic root of 7218473 is about 193.2628792696.

The spelling of 7218473 in words is "seven million, two hundred eighteen thousand, four hundred seventy-three".