216344454 has 16 divisors (see below), whose sum is σ = 443242800. Its totient is φ = 70355840.

The previous prime is 216344441. The next prime is 216344497. The reversal of 216344454 is 454443612.

It is a happy number.

216344454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439479 + ... + 439970.

It is an arithmetic number, because the mean of its divisors is an integer number (27702675).

Almost surely, 2^216344454 is an apocalyptic number.

216344454 is an abundant number, since it is smaller than the sum of its proper divisors (226898346).

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

216344454 is a wasteful number, since it uses less digits than its factorization.

216344454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879495.

The product of its digits is 46080, while the sum is 33.

The square root of 216344454 is about 14708.6523515922. The cubic root of 216344454 is about 600.3187695022.

The spelling of 216344454 in words is "two hundred sixteen million, three hundred forty-four thousand, four hundred fifty-four".