7320981551 has 16 divisors (see below), whose sum is σ = 8110001760. Its totient is φ = 6566901120.

The previous prime is 7320981529. The next prime is 7320981553. The reversal of 7320981551 is 1551890237.

It is not a de Polignac number, because 7320981551 - 2⁶ = 7320981487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7320981499 and 7320981508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7320981553) 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 15 ways as a sum of consecutive naturals, for example, 10205 + ... + 121433.

It is an arithmetic number, because the mean of its divisors is an integer number (506875110).

Almost surely, 2^7320981551 is an apocalyptic number.

7320981551 is a deficient number, since it is larger than the sum of its proper divisors (789020209).

7320981551 is a wasteful number, since it uses less digits than its factorization.

7320981551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111386.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 7320981551 is about 85562.7345928121. The cubic root of 7320981551 is about 1941.7341590724.

The spelling of 7320981551 in words is "seven billion, three hundred twenty million, nine hundred eighty-one thousand, five hundred fifty-one".