215126120 has 64 divisors (see below), whose sum is σ = 529934400. Its totient is φ = 77946880.

The previous prime is 215126101. The next prime is 215126141. The reversal of 215126120 is 21621512.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 215126092 and 215126101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151976 + ... + 153384.

It is an arithmetic number, because the mean of its divisors is an integer number (8280225).

Almost surely, 2^215126120 is an apocalyptic number.

215126120 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 215126120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264967200).

215126120 is an abundant number, since it is smaller than the sum of its proper divisors (314808280).

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

215126120 is a wasteful number, since it uses less digits than its factorization.

215126120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 215126120 is about 14667.1783244085. The cubic root of 215126120 is about 599.1897581914.

Adding to 215126120 its reverse (21621512), we get a palindrome (236747632).

The spelling of 215126120 in words is "two hundred fifteen million, one hundred twenty-six thousand, one hundred twenty".