216510742 has 32 divisors (see below), whose sum is σ = 393845760. Its totient is φ = 87143040.

The previous prime is 216510739. The next prime is 216510751. The reversal of 216510742 is 247015612.

216510742 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 216510742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175267 + ... + 176497.

It is an arithmetic number, because the mean of its divisors is an integer number (12307680).

Almost surely, 2^216510742 is an apocalyptic number.

216510742 is a deficient number, since it is larger than the sum of its proper divisors (177335018).

216510742 is a wasteful number, since it uses less digits than its factorization.

216510742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 216510742 is about 14714.3039930538. The cubic root of 216510742 is about 600.4725370095.

The spelling of 216510742 in words is "two hundred sixteen million, five hundred ten thousand, seven hundred forty-two".