15722722481 has 4 divisors (see below), whose sum is σ = 15861861732. Its totient is φ = 15583583232.

The previous prime is 15722722451. The next prime is 15722722511. The reversal of 15722722481 is 18422722751.

15722722481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18422722751 = 5743 ⋅3207857.

It is an interprime number because it is at equal distance from previous prime (15722722451) and next prime (15722722511).

It can be written as a sum of positive squares in 2 ways, for example, as 237160000 + 15485562481 = 15400^2 + 124441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15722722481 is a prime.

It is a super-2 number, since 2×15722722481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15722722441) 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, 69569456 + ... + 69569681.

It is an arithmetic number, because the mean of its divisors is an integer number (3965465433).

Almost surely, 2^15722722481 is an apocalyptic number.

It is an amenable number.

15722722481 is a deficient number, since it is larger than the sum of its proper divisors (139139251).

15722722481 is a wasteful number, since it uses less digits than its factorization.

15722722481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139139250.

The product of its digits is 125440, while the sum is 41.

The spelling of 15722722481 in words is "fifteen billion, seven hundred twenty-two million, seven hundred twenty-two thousand, four hundred eighty-one".