216553400 has 48 divisors (see below), whose sum is σ = 575417040. Its totient is φ = 74246400.

The previous prime is 216553357. The next prime is 216553417. The reversal of 216553400 is 4355612.

It is a self number, because there is not a number n which added to its sum of digits gives 216553400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75941 + ... + 78740.

It is an arithmetic number, because the mean of its divisors is an integer number (11987855).

Almost surely, 2^216553400 is an apocalyptic number.

216553400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216553400 is an abundant number, since it is smaller than the sum of its proper divisors (358863640).

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

216553400 is a wasteful number, since it uses less digits than its factorization.

216553400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154704 (or 154695 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 216553400 is about 14715.7534635505. The cubic root of 216553400 is about 600.5119704270.

The spelling of 216553400 in words is "two hundred sixteen million, five hundred fifty-three thousand, four hundred".