216361454 has 4 divisors (see below), whose sum is σ = 324542184. Its totient is φ = 108180726.

The previous prime is 216361447. The next prime is 216361471. The reversal of 216361454 is 454163612.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 216361454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54090362 + ... + 54090365.

It is an arithmetic number, because the mean of its divisors is an integer number (81135546).

Almost surely, 2^216361454 is an apocalyptic number.

216361454 is a deficient number, since it is larger than the sum of its proper divisors (108180730).

216361454 is a wasteful number, since it uses less digits than its factorization.

216361454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108180729.

The product of its digits is 17280, while the sum is 32.

The square root of 216361454 is about 14709.2302313887. The cubic root of 216361454 is about 600.3344931189.

The spelling of 216361454 in words is "two hundred sixteen million, three hundred sixty-one thousand, four hundred fifty-four".