216261607 has 4 divisors (see below), whose sum is σ = 228982896. Its totient is φ = 203540320.

The previous prime is 216261599. The next prime is 216261623. The reversal of 216261607 is 706162612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 216261607 - 2³ = 216261599 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216261637) 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, 6360619 + ... + 6360652.

It is an arithmetic number, because the mean of its divisors is an integer number (57245724).

Almost surely, 2^216261607 is an apocalyptic number.

216261607 is a deficient number, since it is larger than the sum of its proper divisors (12721289).

216261607 is a wasteful number, since it uses less digits than its factorization.

216261607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12721288.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 216261607 is about 14705.8358143969. The cubic root of 216261607 is about 600.2421309782.

The spelling of 216261607 in words is "two hundred sixteen million, two hundred sixty-one thousand, six hundred seven".