7217974481 has 4 divisors (see below), whose sum is σ = 7221830052. Its totient is φ = 7214118912.

The previous prime is 7217974447. The next prime is 7217974487. The reversal of 7217974481 is 1844797127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1844797127 = 21101 ⋅87427.

It can be written as a sum of positive squares in 2 ways, for example, as 442050625 + 6775923856 = 21025^2 + 82316^2 .

It is a cyclic number.

It is not a de Polignac number, because 7217974481 - 2³⁰ = 6144232657 is a prime.

It is a super-2 number, since 2×7217974481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7217974487) 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, 1924976 + ... + 1928721.

It is an arithmetic number, because the mean of its divisors is an integer number (1805457513).

Almost surely, 2^7217974481 is an apocalyptic number.

It is an amenable number.

7217974481 is a deficient number, since it is larger than the sum of its proper divisors (3855571).

7217974481 is a wasteful number, since it uses less digits than its factorization.

7217974481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855570.

The product of its digits is 790272, while the sum is 50.

The square root of 7217974481 is about 84958.6633663689. The cubic root of 7217974481 is about 1932.5843015528.

The spelling of 7217974481 in words is "seven billion, two hundred seventeen million, nine hundred seventy-four thousand, four hundred eighty-one".