215320530 has 16 divisors (see below), whose sum is σ = 516769344. Its totient is φ = 57418800.

The previous prime is 215320519. The next prime is 215320537. The reversal of 215320530 is 35023512.

It is a junction number, because it is equal to n+sod(n) for n = 215320497 and 215320506.

It is not an unprimeable number, because it can be changed into a prime (215320537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3588646 + ... + 3588705.

It is an arithmetic number, because the mean of its divisors is an integer number (32298084).

Almost surely, 2^215320530 is an apocalyptic number.

215320530 is an abundant number, since it is smaller than the sum of its proper divisors (301448814).

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

215320530 is a wasteful number, since it uses less digits than its factorization.

215320530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7177361.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 215320530 is about 14673.8042102244. The cubic root of 215320530 is about 599.3702002629.

The spelling of 215320530 in words is "two hundred fifteen million, three hundred twenty thousand, five hundred thirty".