7218101 has 8 divisors (see below), whose sum is σ = 7945344. Its totient is φ = 6502720.

The previous prime is 7218083. The next prime is 7218121. The reversal of 7218101 is 1018127.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7218101 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a pancake number, because a pancake can be divided into 7218101 parts by 3799 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7218121) 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 7 ways as a sum of consecutive naturals, for example, 1661 + ... + 4146.

It is an arithmetic number, because the mean of its divisors is an integer number (993168).

Almost surely, 2^7218101 is an apocalyptic number.

It is an amenable number.

7218101 is a deficient number, since it is larger than the sum of its proper divisors (727243).

7218101 is a wasteful number, since it uses less digits than its factorization.

7218101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5931.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 7218101 is about 2686.6523779603. The cubic root of 7218101 is about 193.2595593142.

The spelling of 7218101 in words is "seven million, two hundred eighteen thousand, one hundred one".