7218995 has 16 divisors (see below), whose sum is σ = 9953280. Its totient is φ = 4923744.

The previous prime is 7218983. The next prime is 7218997. The reversal of 7218995 is 5998127.

7218995 = 286² + 287² + ... + 355².

It is not a de Polignac number, because 7218995 - 2⁴ = 7218979 is a prime.

It is a super-2 number, since 2×7218995² = 104227777620050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7218997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7934 + ... + 8796.

It is an arithmetic number, because the mean of its divisors is an integer number (622080).

Almost surely, 2^7218995 is an apocalyptic number.

7218995 is a deficient number, since it is larger than the sum of its proper divisors (2734285).

7218995 is a wasteful number, since it uses less digits than its factorization.

7218995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114.

The product of its digits is 45360, while the sum is 41.

The square root of 7218995 is about 2686.8187508650. The cubic root of 7218995 is about 193.2675377245.

The spelling of 7218995 in words is "seven million, two hundred eighteen thousand, nine hundred ninety-five".