216125867 has 4 divisors (see below), whose sum is σ = 219668976. Its totient is φ = 212582760.

The previous prime is 216125863. The next prime is 216125873. The reversal of 216125867 is 768521612.

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

It is a cyclic number.

It is not a de Polignac number, because 216125867 - 2² = 216125863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216125867.

It is not an unprimeable number, because it can be changed into a prime (216125863) 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, 1771463 + ... + 1771584.

It is an arithmetic number, because the mean of its divisors is an integer number (54917244).

Almost surely, 2^216125867 is an apocalyptic number.

216125867 is a deficient number, since it is larger than the sum of its proper divisors (3543109).

216125867 is an equidigital number, since it uses as much as digits as its factorization.

216125867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543108.

The product of its digits is 40320, while the sum is 38.

The square root of 216125867 is about 14701.2199153676. The cubic root of 216125867 is about 600.1165208885.

The spelling of 216125867 in words is "two hundred sixteen million, one hundred twenty-five thousand, eight hundred sixty-seven".