321429430745 has 16 divisors (see below), whose sum is σ = 387765401232. Its totient is φ = 255777177600.

The previous prime is 321429430723. The next prime is 321429430753. The reversal of 321429430745 is 547034924123.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 71961289 + 321357469456 = 8483^2 + 566884^2 .

It is a de Polignac number, because none of the positive numbers 2^k-321429430745 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321429430696 and 321429430705.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9247619 + ... + 9282311.

It is an arithmetic number, because the mean of its divisors is an integer number (24235337577).

Almost surely, 2^321429430745 is an apocalyptic number.

It is an amenable number.

321429430745 is a deficient number, since it is larger than the sum of its proper divisors (66335970487).

321429430745 is a wasteful number, since it uses less digits than its factorization.

321429430745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44492.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 321429430745 in words is "three hundred twenty-one billion, four hundred twenty-nine million, four hundred thirty thousand, seven hundred forty-five".