7319305123821 has 6 divisors (see below), whose sum is σ = 10572329623310. Its totient is φ = 4879536749208.

The previous prime is 7319305123783. The next prime is 7319305123841. The reversal of 7319305123821 is 1283215039137.

7319305123821 is a `hidden beast` number, since 7 + 319 + 30 + 51 + 238 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3679928602596 + 3639376521225 = 1918314^2 + 1907715^2 .

It is not a de Polignac number, because 7319305123821 - 2¹¹ = 7319305121773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7319305123841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 406628062426 + ... + 406628062443.

Almost surely, 2^{7319305123821} is an apocalyptic number.

It is an amenable number.

7319305123821 is a deficient number, since it is larger than the sum of its proper divisors (3253024499489).

7319305123821 is a wasteful number, since it uses less digits than its factorization.

7319305123821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813256124875 (or 813256124872 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 7319305123821 in words is "seven trillion, three hundred nineteen billion, three hundred five million, one hundred twenty-three thousand, eight hundred twenty-one".