216154456 has 32 divisors (see below), whose sum is σ = 490436640. Its totient is φ = 87187968.

The previous prime is 216154453. The next prime is 216154513. The reversal of 216154456 is 654451612.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216154453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112575 + ... + 114478.

It is an arithmetic number, because the mean of its divisors is an integer number (15326145).

Almost surely, 2^216154456 is an apocalyptic number.

It is an amenable number.

216154456 is an abundant number, since it is smaller than the sum of its proper divisors (274282184).

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

216154456 is a wasteful number, since it uses less digits than its factorization.

216154456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227083 (or 227079 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 216154456 is about 14702.1922174892. The cubic root of 216154456 is about 600.1429807396.

The spelling of 216154456 in words is "two hundred sixteen million, one hundred fifty-four thousand, four hundred fifty-six".