216321753 has 8 divisors (see below), whose sum is σ = 305395488. Its totient is φ = 135731264.

The previous prime is 216321713. The next prime is 216321757. The reversal of 216321753 is 357123612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216321753 - 2¹³ = 216313561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216321753.

It is not an unprimeable number, because it can be changed into a prime (216321757) 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, 2120751 + ... + 2120852.

It is an arithmetic number, because the mean of its divisors is an integer number (38174436).

Almost surely, 2^216321753 is an apocalyptic number.

It is an amenable number.

216321753 is a deficient number, since it is larger than the sum of its proper divisors (89073735).

216321753 is a wasteful number, since it uses less digits than its factorization.

216321753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4241623.

The product of its digits is 7560, while the sum is 30.

The square root of 216321753 is about 14707.8806427031. The cubic root of 216321753 is about 600.2977716401.

The spelling of 216321753 in words is "two hundred sixteen million, three hundred twenty-one thousand, seven hundred fifty-three".