216501480 has 96 divisors (see below), whose sum is σ = 757771560. Its totient is φ = 53291520.

The previous prime is 216501457. The next prime is 216501487. The reversal of 216501480 is 84105612.

216501480 is a `hidden beast` number, since 2 + 1 + 650 + 1 + 4 + 8 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 198302724 + 18198756 = 14082^2 + 4266^2 .

It is not an unprimeable number, because it can be changed into a prime (216501487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18451 + ... + 27810.

Almost surely, 2^216501480 is an apocalyptic number.

216501480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216501480 is an abundant number, since it is smaller than the sum of its proper divisors (541270080).

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

216501480 is a wasteful number, since it uses less digits than its factorization.

216501480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46291 (or 46284 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 216501480 is about 14713.9892619235. The cubic root of 216501480 is about 600.4639744537.

The spelling of 216501480 in words is "two hundred sixteen million, five hundred one thousand, four hundred eighty".