216216425401 has 8 divisors (see below), whose sum is σ = 223550454600. Its totient is φ = 208960835328.

The previous prime is 216216425363. The next prime is 216216425449. The reversal of 216216425401 is 104524612612.

216216425401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19293487801 + 196922937600 = 138901^2 + 443760^2 .

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

It is not a de Polignac number, because 216216425401 - 2²⁷ = 216082207673 is a prime.

It is a super-2 number, since 2×216216425401² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216216420401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19604176 + ... + 19615201.

It is an arithmetic number, because the mean of its divisors is an integer number (27943806825).

Almost surely, 2^216216425401 is an apocalyptic number.

It is an amenable number.

216216425401 is a deficient number, since it is larger than the sum of its proper divisors (7334029199).

216216425401 is a wasteful number, since it uses less digits than its factorization.

216216425401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39219563.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 216216425401 in words is "two hundred sixteen billion, two hundred sixteen million, four hundred twenty-five thousand, four hundred one".