215352530 has 8 divisors (see below), whose sum is σ = 387634572. Its totient is φ = 86141008.

The previous prime is 215352497. The next prime is 215352559. The reversal of 215352530 is 35253512.

It can be written as a sum of positive squares in 2 ways, for example, as 194072761 + 21279769 = 13931^2 + 4613^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 215352530.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10767617 + ... + 10767636.

Almost surely, 2^215352530 is an apocalyptic number.

215352530 is a deficient number, since it is larger than the sum of its proper divisors (172282042).

215352530 is a wasteful number, since it uses less digits than its factorization.

215352530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21535260.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 215352530 is about 14674.8945481731. The cubic root of 215352530 is about 599.3998907223.

The spelling of 215352530 in words is "two hundred fifteen million, three hundred fifty-two thousand, five hundred thirty".