215434 has 4 divisors (see below), whose sum is σ = 323154. Its totient is φ = 107716.

The previous prime is 215417. The next prime is 215443. The reversal of 215434 is 434512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 199809 + 15625 = 447^2 + 125^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53857 + ... + 53860.

2²¹⁵⁴³⁴ is an apocalyptic number.

215434 is a deficient number, since it is larger than the sum of its proper divisors (107720).

215434 is a wasteful number, since it uses less digits than its factorization.

215434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107719.

The product of its digits is 480, while the sum is 19.

The square root of 215434 is about 464.1486830747. The cubic root of 215434 is about 59.9475467502.

Adding to 215434 its reverse (434512), we get a palindrome (649946).

The spelling of 215434 in words is "two hundred fifteen thousand, four hundred thirty-four".