216767451 has 16 divisors (see below), whose sum is σ = 296569728. Its totient is φ = 140750400.

The previous prime is 216767437. The next prime is 216767471. The reversal of 216767451 is 154767612.

It is not a de Polignac number, because 216767451 - 2⁹ = 216766939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216767401) 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 15 ways as a sum of consecutive naturals, for example, 100656 + ... + 102786.

It is an arithmetic number, because the mean of its divisors is an integer number (18535608).

Almost surely, 2^216767451 is an apocalyptic number.

216767451 is a deficient number, since it is larger than the sum of its proper divisors (79802277).

216767451 is a wasteful number, since it uses less digits than its factorization.

216767451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002.

The product of its digits is 70560, while the sum is 39.

The square root of 216767451 is about 14723.0245194389. The cubic root of 216767451 is about 600.7097628412.

The spelling of 216767451 in words is "two hundred sixteen million, seven hundred sixty-seven thousand, four hundred fifty-one".