7222657 has 4 divisors (see below), whose sum is σ = 7778260. Its totient is φ = 6667056.

The previous prime is 7222643. The next prime is 7222661. The reversal of 7222657 is 7562227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2660161 + 4562496 = 1631^2 + 2136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7222657 is a prime.

It is a d-powerful number, because it can be written as 7 + 2¹¹ + 2¹⁴ + 2²⁰ + 6³ + 5⁸ + 7⁸ .

It is the 2688-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7222627) by changing a digit.

It is a nontrivial repunit in base 2687.

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, 277782 + ... + 277807.

It is an arithmetic number, because the mean of its divisors is an integer number (1944565).

Almost surely, 2^7222657 is an apocalyptic number.

It is an amenable number.

7222657 is a deficient number, since it is larger than the sum of its proper divisors (555603).

7222657 is a wasteful number, since it uses less digits than its factorization.

7222657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555602.

The product of its digits is 11760, while the sum is 31.

The square root of 7222657 is about 2687.5001395349. The cubic root of 7222657 is about 193.3002119902.

The spelling of 7222657 in words is "seven million, two hundred twenty-two thousand, six hundred fifty-seven".