16217434 has 8 divisors (see below), whose sum is σ = 24450228. Its totient is φ = 8067360.

The previous prime is 16217429. The next prime is 16217437. The reversal of 16217434 is 43471261.

It can be written as a sum of positive squares in 2 ways, for example, as 13344409 + 2873025 = 3653^2 + 1695^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16217437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20187 + ... + 20974.

Almost surely, 2^16217434 is an apocalyptic number.

16217434 is a deficient number, since it is larger than the sum of its proper divisors (8232794).

16217434 is a wasteful number, since it uses less digits than its factorization.

16217434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41360.

The product of its digits is 4032, while the sum is 28.

The square root of 16217434 is about 4027.0875331932. The cubic root of 16217434 is about 253.1205349820.

Adding to 16217434 its reverse (43471261), we get a palindrome (59688695).

The spelling of 16217434 in words is "sixteen million, two hundred seventeen thousand, four hundred thirty-four".