216046401 has 4 divisors (see below), whose sum is σ = 288061872. Its totient is φ = 144030932.

The previous prime is 216046399. The next prime is 216046447. The reversal of 216046401 is 104640612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216046401 - 2¹ = 216046399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216046301) 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, 36007731 + ... + 36007736.

It is an arithmetic number, because the mean of its divisors is an integer number (72015468).

Almost surely, 2^216046401 is an apocalyptic number.

It is an amenable number.

216046401 is a deficient number, since it is larger than the sum of its proper divisors (72015471).

216046401 is an equidigital number, since it uses as much as digits as its factorization.

216046401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72015470.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 216046401 is about 14698.5169660071. The cubic root of 216046401 is about 600.0429608128.

The spelling of 216046401 in words is "two hundred sixteen million, forty-six thousand, four hundred one".