216545470 has 16 divisors (see below), whose sum is σ = 410297040. Its totient is φ = 82059264.

The previous prime is 216545453. The next prime is 216545471. The reversal of 216545470 is 74545612.

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 (216545471) 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, 569667 + ... + 570046.

It is an arithmetic number, because the mean of its divisors is an integer number (25643565).

Almost surely, 2^216545470 is an apocalyptic number.

216545470 is a deficient number, since it is larger than the sum of its proper divisors (193751570).

216545470 is a wasteful number, since it uses less digits than its factorization.

216545470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139739.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 216545470 is about 14715.4840219410. The cubic root of 216545470 is about 600.5046402595.

The spelling of 216545470 in words is "two hundred sixteen million, five hundred forty-five thousand, four hundred seventy".