216901456 has 10 divisors (see below), whose sum is σ = 420246602. Its totient is φ = 108450720.

The previous prime is 216901403. The next prime is 216901457. The reversal of 216901456 is 654109612.

It can be written as a sum of positive squares in only one way, i.e., 199261456 + 17640000 = 14116^2 + 4200^2 .

It is a super-2 number, since 2×216901456² = 94092483229839872, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216901457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6778155 + ... + 6778186.

Almost surely, 2^216901456 is an apocalyptic number.

It is an amenable number.

216901456 is a deficient number, since it is larger than the sum of its proper divisors (203345146).

216901456 is a wasteful number, since it uses less digits than its factorization.

216901456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13556349 (or 13556343 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 216901456 is about 14727.5746815285. The cubic root of 216901456 is about 600.8335230109.

The spelling of 216901456 in words is "two hundred sixteen million, nine hundred one thousand, four hundred fifty-six".