216302140 has 12 divisors (see below), whose sum is σ = 454234536. Its totient is φ = 86520848.

The previous prime is 216302123. The next prime is 216302161. The reversal of 216302140 is 41203612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5407534 + ... + 5407573.

It is an arithmetic number, because the mean of its divisors is an integer number (37852878).

Almost surely, 2^216302140 is an apocalyptic number.

216302140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216302140 is an abundant number, since it is smaller than the sum of its proper divisors (237932396).

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

216302140 is a wasteful number, since it uses less digits than its factorization.

216302140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10815116 (or 10815114 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 216302140 is about 14707.2138761901. The cubic root of 216302140 is about 600.2796289185.

Adding to 216302140 its reverse (41203612), we get a palindrome (257505752).

The spelling of 216302140 in words is "two hundred sixteen million, three hundred two thousand, one hundred forty".