216553454 has 8 divisors (see below), whose sum is σ = 349817160. Its totient is φ = 99947736.

The previous prime is 216553433. The next prime is 216553481. The reversal of 216553454 is 454355612.

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 4164464 + ... + 4164515.

It is an arithmetic number, because the mean of its divisors is an integer number (43727145).

Almost surely, 2^216553454 is an apocalyptic number.

216553454 is a deficient number, since it is larger than the sum of its proper divisors (133263706).

216553454 is a wasteful number, since it uses less digits than its factorization.

216553454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8328994.

The product of its digits is 72000, while the sum is 35.

The square root of 216553454 is about 14715.7552983189. The cubic root of 216553454 is about 600.5120203417.

The spelling of 216553454 in words is "two hundred sixteen million, five hundred fifty-three thousand, four hundred fifty-four".