215403215552 has 56 divisors (see below), whose sum is σ = 505348707360. Its totient is φ = 89132359680.

The previous prime is 215403215543. The next prime is 215403215557. The reversal of 215403215552 is 255512304512.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (215403215557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8276849 + ... + 8302832.

It is an arithmetic number, because the mean of its divisors is an integer number (9024084060).

Almost surely, 2^215403215552 is an apocalyptic number.

It is an amenable number.

215403215552 is an abundant number, since it is smaller than the sum of its proper divisors (289945491808).

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

215403215552 is a wasteful number, since it uses less digits than its factorization.

215403215552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16579729 (or 16579719 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 215403215552 in words is "two hundred fifteen billion, four hundred three million, two hundred fifteen thousand, five hundred fifty-two".