216146774 has 16 divisors (see below), whose sum is σ = 345401280. Its totient is φ = 101150280.

The previous prime is 216146771. The next prime is 216146837. The reversal of 216146774 is 477641612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216146771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31112 + ... + 37419.

It is an arithmetic number, because the mean of its divisors is an integer number (21587580).

Almost surely, 2^216146774 is an apocalyptic number.

216146774 is a deficient number, since it is larger than the sum of its proper divisors (129254506).

216146774 is a wasteful number, since it uses less digits than its factorization.

216146774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68635.

The product of its digits is 56448, while the sum is 38.

The square root of 216146774 is about 14701.9309616118. The cubic root of 216146774 is about 600.1358710813.

The spelling of 216146774 in words is "two hundred sixteen million, one hundred forty-six thousand, seven hundred seventy-four".