216503970 has 16 divisors (see below), whose sum is σ = 519609600. Its totient is φ = 57734384.

The previous prime is 216503953. The next prime is 216503971. The reversal of 216503970 is 79305612.

It is not an unprimeable number, because it can be changed into a prime (216503971) 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, 3608370 + ... + 3608429.

It is an arithmetic number, because the mean of its divisors is an integer number (32475600).

Almost surely, 2^216503970 is an apocalyptic number.

216503970 is an abundant number, since it is smaller than the sum of its proper divisors (303105630).

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

216503970 is a wasteful number, since it uses less digits than its factorization.

216503970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7216809.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 216503970 is about 14714.0738750354. The cubic root of 216503970 is about 600.4662764388.

The spelling of 216503970 in words is "two hundred sixteen million, five hundred three thousand, nine hundred seventy".