216870951 has 16 divisors (see below), whose sum is σ = 318705408. Its totient is φ = 130080000.

The previous prime is 216870923. The next prime is 216870967. The reversal of 216870951 is 159078612.

216870951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216870951 - 2⁵ = 216870919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216870911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30675 + ... + 37076.

It is an arithmetic number, because the mean of its divisors is an integer number (19919088).

Almost surely, 2^216870951 is an apocalyptic number.

216870951 is a deficient number, since it is larger than the sum of its proper divisors (101834457).

216870951 is a wasteful number, since it uses less digits than its factorization.

216870951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67862.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 216870951 is about 14726.5390027664. The cubic root of 216870951 is about 600.8053546340.

The spelling of 216870951 in words is "two hundred sixteen million, eight hundred seventy thousand, nine hundred fifty-one".