321215402340 has 144 divisors (see below), whose sum is σ = 1123401621888. Its totient is φ = 72770890752.

The previous prime is 321215402293. The next prime is 321215402353. The reversal of 321215402340 is 43204512123.

321215402340 is a `hidden beast` number, since 3 + 2 + 1 + 215 + 402 + 3 + 40 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 985642 + ... + 1270401.

It is an arithmetic number, because the mean of its divisors is an integer number (7801400152).

Almost surely, 2^321215402340 is an apocalyptic number.

321215402340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321215402340 is an abundant number, since it is smaller than the sum of its proper divisors (802186219548).

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

321215402340 is a wasteful number, since it uses less digits than its factorization.

321215402340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256178 (or 2256173 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 321215402340 its reverse (43204512123), we get a palindrome (364419914463).

The spelling of 321215402340 in words is "three hundred twenty-one billion, two hundred fifteen million, four hundred two thousand, three hundred forty".