215531453530 has 32 divisors (see below), whose sum is σ = 389884938624. Its totient is φ = 85784911296.

The previous prime is 215531453519. The next prime is 215531453531. The reversal of 215531453530 is 35354135512.

215531453530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 215531453530.

It is not an unprimeable number, because it can be changed into a prime (215531453531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2005749 + ... + 2110471.

It is an arithmetic number, because the mean of its divisors is an integer number (12183904332).

Almost surely, 2^215531453530 is an apocalyptic number.

215531453530 is a deficient number, since it is larger than the sum of its proper divisors (174353485094).

215531453530 is a wasteful number, since it uses less digits than its factorization.

215531453530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105750.

The product of its (nonzero) digits is 135000, while the sum is 37.

The spelling of 215531453530 in words is "two hundred fifteen billion, five hundred thirty-one million, four hundred fifty-three thousand, five hundred thirty".