216145470 has 16 divisors (see below), whose sum is σ = 518749200. Its totient is φ = 57638784.

The previous prime is 216145469. The next prime is 216145471. The reversal of 216145470 is 74541612.

216145470 is digitally balanced in base 3, 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 (216145469) and next prime (216145471).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 7204849 = 216145470 / (2 + 1 + 6 + 1 + 4 + 5 + 4 + 7 + 0).

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 (216145471) 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, 3602395 + ... + 3602454.

It is an arithmetic number, because the mean of its divisors is an integer number (32421825).

Almost surely, 2^216145470 is an apocalyptic number.

216145470 is an abundant number, since it is smaller than the sum of its proper divisors (302603730).

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

216145470 is a wasteful number, since it uses less digits than its factorization.

216145470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7204859.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 216145470 is about 14701.8866136289. The cubic root of 216145470 is about 600.1346642181.

The spelling of 216145470 in words is "two hundred sixteen million, one hundred forty-five thousand, four hundred seventy".