216543470 has 32 divisors (see below), whose sum is σ = 457924320. Its totient is φ = 72685440.

The previous prime is 216543461. The next prime is 216543487. The reversal of 216543470 is 74345612.

216543470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74285 + ... + 77144.

It is an arithmetic number, because the mean of its divisors is an integer number (14310135).

Almost surely, 2^216543470 is an apocalyptic number.

216543470 is an abundant number, since it is smaller than the sum of its proper divisors (241380850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216543470 is a wasteful number, since it uses less digits than its factorization.

216543470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151460.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 216543470 is about 14715.4160661532. The cubic root of 216543470 is about 600.5027915131.

The spelling of 216543470 in words is "two hundred sixteen million, five hundred forty-three thousand, four hundred seventy".