216702401 has 4 divisors (see below), whose sum is σ = 216750000. Its totient is φ = 216654804.

The previous prime is 216702347. The next prime is 216702403. The reversal of 216702401 is 104207612.

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 216702401 - 2⁶ = 216702337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216702403) 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, 16151 + ... + 26348.

It is an arithmetic number, because the mean of its divisors is an integer number (54187500).

Almost surely, 2^216702401 is an apocalyptic number.

It is an amenable number.

216702401 is a deficient number, since it is larger than the sum of its proper divisors (47599).

216702401 is an equidigital number, since it uses as much as digits as its factorization.

216702401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47598.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 216702401 is about 14720.8152287840. The cubic root of 216702401 is about 600.6496675958.

The spelling of 216702401 in words is "two hundred sixteen million, seven hundred two thousand, four hundred one".