215023520 has 48 divisors (see below), whose sum is σ = 510209280. Its totient is φ = 85634304.

The previous prime is 215023511. The next prime is 215023541. The reversal of 215023520 is 25320512.

It is a super-2 number, since 2×215023520² = 92470228306380800, which contains 22 as substring.

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 = 215023492 and 215023501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35429 + ... + 41051.

It is an arithmetic number, because the mean of its divisors is an integer number (10629360).

Almost surely, 2^215023520 is an apocalyptic number.

215023520 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 215023520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255104640).

215023520 is an abundant number, since it is smaller than the sum of its proper divisors (295185760).

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

215023520 is a wasteful number, since it uses less digits than its factorization.

215023520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5877 (or 5869 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 215023520 is about 14663.6803020251. The cubic root of 215023520 is about 599.0944859465.

The spelling of 215023520 in words is "two hundred fifteen million, twenty-three thousand, five hundred twenty".