215302020 has 48 divisors (see below), whose sum is σ = 606916800. Its totient is φ = 57026176.

The previous prime is 215301997. The next prime is 215302051. The reversal of 215302020 is 20203512.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3102 + ... + 20981.

It is an arithmetic number, because the mean of its divisors is an integer number (12644100).

Almost surely, 2^215302020 is an apocalyptic number.

215302020 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 215302020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303458400).

215302020 is an abundant number, since it is smaller than the sum of its proper divisors (391614780).

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

215302020 is a wasteful number, since it uses less digits than its factorization.

215302020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24244 (or 24242 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 215302020 is about 14673.1734808800. The cubic root of 215302020 is about 599.3530248449.

Adding to 215302020 its reverse (20203512), we get a palindrome (235505532).

The spelling of 215302020 in words is "two hundred fifteen million, three hundred two thousand, twenty".