7267821481 has 8 divisors (see below), whose sum is σ = 7289528904. Its totient is φ = 7246147200.

The previous prime is 7267821479. The next prime is 7267821503. The reversal of 7267821481 is 1841287627.

It can be written as a sum of positive squares in 4 ways, for example, as 3933798400 + 3334023081 = 62720^2 + 57741^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7267821481 - 2¹ = 7267821479 is a prime.

It is a super-2 number, since 2×7267821481² (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 (7267821401) 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, 471411 + ... + 486583.

It is an arithmetic number, because the mean of its divisors is an integer number (911191113).

Almost surely, 2^7267821481 is an apocalyptic number.

It is an amenable number.

7267821481 is a deficient number, since it is larger than the sum of its proper divisors (21707423).

7267821481 is a wasteful number, since it uses less digits than its factorization.

7267821481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16571.

The product of its digits is 301056, while the sum is 46.

The square root of 7267821481 is about 85251.5189366148. The cubic root of 7267821481 is about 1937.0228790943.

The spelling of 7267821481 in words is "seven billion, two hundred sixty-seven million, eight hundred twenty-one thousand, four hundred eighty-one".