216420612 has 24 divisors (see below), whose sum is σ = 505442112. Its totient is φ = 72074400.

The previous prime is 216420577. The next prime is 216420647. The reversal of 216420612 is 216024612.

It is an interprime number because it is at equal distance from previous prime (216420577) and next prime (216420647).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6537 + ... + 21807.

It is an arithmetic number, because the mean of its divisors is an integer number (21060088).

Almost surely, 2^216420612 is an apocalyptic number.

It is an amenable number.

216420612 is an abundant number, since it is smaller than the sum of its proper divisors (289021500).

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

216420612 is a wasteful number, since it uses less digits than its factorization.

216420612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16459 (or 16457 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 216420612 is about 14711.2410081543. The cubic root of 216420612 is about 600.3892030360.

The spelling of 216420612 in words is "two hundred sixteen million, four hundred twenty thousand, six hundred twelve".