215103020 has 96 divisors (see below), whose sum is σ = 512096256. Its totient is φ = 75219200.

The previous prime is 215103013. The next prime is 215103043. The reversal of 215103020 is 20301512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 215102986 and 215103004.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 733994 + ... + 734286.

It is an arithmetic number, because the mean of its divisors is an integer number (5334336).

Almost surely, 2^215103020 is an apocalyptic number.

215103020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215103020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256048128).

215103020 is an abundant number, since it is smaller than the sum of its proper divisors (296993236).

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

215103020 is a wasteful number, since it uses less digits than its factorization.

215103020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 215103020 is about 14666.3908307395. The cubic root of 215103020 is about 599.1683106503.

Adding to 215103020 its reverse (20301512), we get a palindrome (235404532).

The spelling of 215103020 in words is "two hundred fifteen million, one hundred three thousand, twenty".