215223120 has 120 divisors (see below), whose sum is σ = 826066176. Its totient is φ = 49192704.

The previous prime is 215223103. The next prime is 215223139. The reversal of 215223120 is 21322512.

215223120 is a `hidden beast` number, since 21 + 522 + 3 + 120 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 215223093 and 215223102.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 16312 + ... + 26391.

Almost surely, 2^215223120 is an apocalyptic number.

215223120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215223120 is an abundant number, since it is smaller than the sum of its proper divisors (610843056).

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

215223120 is a wasteful number, since it uses less digits than its factorization.

215223120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42729 (or 42720 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 215223120 is about 14670.4846545709. The cubic root of 215223120 is about 599.2798025386.

Adding to 215223120 its reverse (21322512), we get a palindrome (236545632).

It can be divided in two parts, 21522 and 3120, that added together give a palindrome (24642).

The spelling of 215223120 in words is "two hundred fifteen million, two hundred twenty-three thousand, one hundred twenty".