216307870 has 16 divisors (see below), whose sum is σ = 406283040. Its totient is φ = 82761184.

The previous prime is 216307867. The next prime is 216307873. The reversal of 216307870 is 78703612.

216307870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (216307867) and next prime (216307873).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216307873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470005 + ... + 470464.

It is an arithmetic number, because the mean of its divisors is an integer number (25392690).

Almost surely, 2^216307870 is an apocalyptic number.

216307870 is a deficient number, since it is larger than the sum of its proper divisors (189975170).

216307870 is a wasteful number, since it uses less digits than its factorization.

216307870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940499.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 216307870 is about 14707.4086772619. The cubic root of 216307870 is about 600.2849294854.

The spelling of 216307870 in words is "two hundred sixteen million, three hundred seven thousand, eight hundred seventy".