7214816905 has 16 divisors (see below), whose sum is σ = 8703803664. Its totient is φ = 5741245440.

The previous prime is 7214816891. The next prime is 7214816911. The reversal of 7214816905 is 5096184127.

It can be written as a sum of positive squares in 8 ways, for example, as 1930108489 + 5284708416 = 43933^2 + 72696^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7214816905 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 857077 + ... + 865453.

It is an arithmetic number, because the mean of its divisors is an integer number (543987729).

Almost surely, 2^7214816905 is an apocalyptic number.

It is an amenable number.

7214816905 is a deficient number, since it is larger than the sum of its proper divisors (1488986759).

7214816905 is a wasteful number, since it uses less digits than its factorization.

7214816905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9276.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 7214816905 is about 84940.0783199545. The cubic root of 7214816905 is about 1932.3024509277.

The spelling of 7214816905 in words is "seven billion, two hundred fourteen million, eight hundred sixteen thousand, nine hundred five".