2215604720400 has 120 divisors (see below), whose sum is σ = 7167591345984. Its totient is φ = 584978112000.

The previous prime is 2215604720311. The next prime is 2215604720401. The reversal of 2215604720400 is 40274065122.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (2215604720401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9019084 + ... + 9261483.

Almost surely, 2^{2215604720400} is an apocalyptic number.

2215604720400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215604720400 is an abundant number, since it is smaller than the sum of its proper divisors (4951986625584).

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

2215604720400 is a wasteful number, since it uses less digits than its factorization.

2215604720400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18280689 (or 18280678 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

Adding to 2215604720400 its reverse (40274065122), we get a palindrome (2255878785522).

The spelling of 2215604720400 in words is "two trillion, two hundred fifteen billion, six hundred four million, seven hundred twenty thousand, four hundred".