216502401 has 8 divisors (see below), whose sum is σ = 288900000. Its totient is φ = 144219872.

The previous prime is 216502399. The next prime is 216502411. The reversal of 216502401 is 104205612.

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

It is a cyclic number.

It is not a de Polignac number, because 216502401 - 2¹ = 216502399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216502411) 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, 24276 + ... + 31973.

It is an arithmetic number, because the mean of its divisors is an integer number (36112500).

Almost surely, 2^216502401 is an apocalyptic number.

It is an amenable number.

216502401 is a deficient number, since it is larger than the sum of its proper divisors (72397599).

216502401 is a wasteful number, since it uses less digits than its factorization.

216502401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57535.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 216502401 is about 14714.0205586373. The cubic root of 216502401 is about 600.4648259129.

The spelling of 216502401 in words is "two hundred sixteen million, five hundred two thousand, four hundred one".