215505104000 has 64 divisors (see below), whose sum is σ = 535799604600. Its totient is φ = 86202035200.

The previous prime is 215505103981. The next prime is 215505104047. The reversal of 215505104000 is 401505512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 144965993536 + 70539110464 = 380744^2 + 265592^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6718535 + ... + 6750534.

Almost surely, 2^215505104000 is an apocalyptic number.

215505104000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215505104000 is an abundant number, since it is smaller than the sum of its proper divisors (320294500600).

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

215505104000 is an equidigital number, since it uses as much as digits as its factorization.

215505104000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13469098 (or 13469076 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 215505104000 its reverse (401505512), we get a palindrome (215906609512).

The spelling of 215505104000 in words is "two hundred fifteen billion, five hundred five million, one hundred four thousand".