215470925828 has 24 divisors (see below), whose sum is σ = 378337941912. Its totient is φ = 107374823424.

The previous prime is 215470925821. The next prime is 215470925861. The reversal of 215470925828 is 828529074512.

It can be written as a sum of positive squares in 4 ways, for example, as 3077142784 + 212393783044 = 55472^2 + 460862^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 215470925828.

It is not an unprimeable number, because it can be changed into a prime (215470925821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1876850 + ... + 1988342.

It is an arithmetic number, because the mean of its divisors is an integer number (15764080913).

Almost surely, 2^215470925828 is an apocalyptic number.

It is an amenable number.

215470925828 is a deficient number, since it is larger than the sum of its proper divisors (162867016084).

215470925828 is a wasteful number, since it uses less digits than its factorization.

215470925828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113111 (or 113109 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 215470925828 in words is "two hundred fifteen billion, four hundred seventy million, nine hundred twenty-five thousand, eight hundred twenty-eight".