216554460 has 24 divisors (see below), whose sum is σ = 606352656. Its totient is φ = 57747840.

The previous prime is 216554441. The next prime is 216554461. The reversal of 216554460 is 64455612.

216554460 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216554461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1804561 + ... + 1804680.

It is an arithmetic number, because the mean of its divisors is an integer number (25264694).

Almost surely, 2^216554460 is an apocalyptic number.

216554460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216554460 is an abundant number, since it is smaller than the sum of its proper divisors (389798196).

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

216554460 is a wasteful number, since it uses less digits than its factorization.

216554460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609253 (or 3609251 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 216554460 is about 14715.7894793314. The cubic root of 216554460 is about 600.5129502340.

The spelling of 216554460 in words is "two hundred sixteen million, five hundred fifty-four thousand, four hundred sixty".