320215422540 has 96 divisors (see below), whose sum is σ = 971354926080. Its totient is φ = 78350236416.

The previous prime is 320215422511. The next prime is 320215422547. The reversal of 320215422540 is 45224512023.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 320215422498 and 320215422507.

It is not an unprimeable number, because it can be changed into a prime (320215422547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1098880 + ... + 1359399.

It is an arithmetic number, because the mean of its divisors is an integer number (10118280480).

Almost surely, 2^320215422540 is an apocalyptic number.

320215422540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320215422540 is an abundant number, since it is smaller than the sum of its proper divisors (651139503540).

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

320215422540 is a wasteful number, since it uses less digits than its factorization.

320215422540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458471 (or 2458469 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 320215422540 its reverse (45224512023), we get a palindrome (365439934563).

The spelling of 320215422540 in words is "three hundred twenty billion, two hundred fifteen million, four hundred twenty-two thousand, five hundred forty".