7221705405 has 8 divisors (see below), whose sum is σ = 11554728672. Its totient is φ = 3851576208.

The previous prime is 7221705401. The next prime is 7221705419. The reversal of 7221705405 is 5045071227.

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

It is not a de Polignac number, because 7221705405 - 2² = 7221705401 is a prime.

It is a super-3 number, since 3×7221705405³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221705401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240723499 + ... + 240723528.

It is an arithmetic number, because the mean of its divisors is an integer number (1444341084).

Almost surely, 2^7221705405 is an apocalyptic number.

It is an amenable number.

7221705405 is a deficient number, since it is larger than the sum of its proper divisors (4333023267).

7221705405 is a wasteful number, since it uses less digits than its factorization.

7221705405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481447035.

The product of its (nonzero) digits is 19600, while the sum is 33.

The square root of 7221705405 is about 84980.6178195946. The cubic root of 7221705405 is about 1932.9172242772.

The spelling of 7221705405 in words is "seven billion, two hundred twenty-one million, seven hundred five thousand, four hundred five".