215420334 has 16 divisors (see below), whose sum is σ = 431350272. Its totient is φ = 71721848.

The previous prime is 215420329. The next prime is 215420357. The reversal of 215420334 is 433024512.

It is a congruent number.

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, 15624 + ... + 25979.

It is an arithmetic number, because the mean of its divisors is an integer number (26959392).

Almost surely, 2^215420334 is an apocalyptic number.

215420334 is an abundant number, since it is smaller than the sum of its proper divisors (215929938).

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

215420334 is a wasteful number, since it uses less digits than its factorization.

215420334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42471.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 215420334 is about 14677.2045703533. The cubic root of 215420334 is about 599.4627913773.

Adding to 215420334 its reverse (433024512), we get a palindrome (648444846).

The spelling of 215420334 in words is "two hundred fifteen million, four hundred twenty thousand, three hundred thirty-four".