216732530 has 16 divisors (see below), whose sum is σ = 445849920. Its totient is φ = 74308272.

The previous prime is 216732499. The next prime is 216732539. The reversal of 216732530 is 35237612.

It is a junction number, because it is equal to n+sod(n) for n = 216732493 and 216732502.

It is not an unprimeable number, because it can be changed into a prime (216732539) 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, 1548020 + ... + 1548159.

It is an arithmetic number, because the mean of its divisors is an integer number (27865620).

Almost surely, 2^216732530 is an apocalyptic number.

216732530 is an abundant number, since it is smaller than the sum of its proper divisors (229117390).

216732530 is a wasteful number, since it uses less digits than its factorization.

216732530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096193.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 216732530 is about 14721.8385400737. The cubic root of 216732530 is about 600.6775032129.

The spelling of 216732530 in words is "two hundred sixteen million, seven hundred thirty-two thousand, five hundred thirty".