7218485971 has 4 divisors (see below), whose sum is σ = 7218861912. Its totient is φ = 7218110032.

The previous prime is 7218485951. The next prime is 7218485987. The reversal of 7218485971 is 1795848127.

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

It is a cyclic number.

It is not a de Polignac number, because 7218485971 - 2³¹ = 5071002323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7218485941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157525 + ... + 198118.

It is an arithmetic number, because the mean of its divisors is an integer number (1804715478).

Almost surely, 2^7218485971 is an apocalyptic number.

7218485971 is a deficient number, since it is larger than the sum of its proper divisors (375941).

7218485971 is a wasteful number, since it uses less digits than its factorization.

7218485971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375940.

The product of its digits is 1128960, while the sum is 52.

The square root of 7218485971 is about 84961.6735416623. The cubic root of 7218485971 is about 1932.6299502870.

The spelling of 7218485971 in words is "seven billion, two hundred eighteen million, four hundred eighty-five thousand, nine hundred seventy-one".