321223210310440 has 64 divisors (see below), whose sum is σ = 726798690604800. Its totient is φ = 127769929421568.

The previous prime is 321223210310399. The next prime is 321223210310467. The reversal of 321223210310440 is 44013012322123.

It is a junction number, because it is equal to n+sod(n) for n = 321223210310399 and 321223210310408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734447502 + ... + 734884738.

It is an arithmetic number, because the mean of its divisors is an integer number (11356229540700).

Almost surely, 2^{321223210310440} is an apocalyptic number.

It is an amenable number.

321223210310440 is an abundant number, since it is smaller than the sum of its proper divisors (405575480294360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321223210310440 is a wasteful number, since it uses less digits than its factorization.

321223210310440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540034 (or 540030 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 321223210310440 its reverse (44013012322123), we get a palindrome (365236222632563).

The spelling of 321223210310440 in words is "three hundred twenty-one trillion, two hundred twenty-three billion, two hundred ten million, three hundred ten thousand, four hundred forty".