216223357 has 16 divisors (see below), whose sum is σ = 270093312. Its totient is φ = 168802560.

The previous prime is 216223349. The next prime is 216223421. The reversal of 216223357 is 753322612.

It is a cyclic number.

It is not a de Polignac number, because 216223357 - 2³ = 216223349 is a prime.

It is a super-2 number, since 2×216223357² = 93505080224698898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216223157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25618 + ... + 32995.

It is an arithmetic number, because the mean of its divisors is an integer number (16880832).

Almost surely, 2^216223357 is an apocalyptic number.

It is an amenable number.

216223357 is a deficient number, since it is larger than the sum of its proper divisors (53869955).

216223357 is a wasteful number, since it uses less digits than its factorization.

216223357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58668.

The product of its digits is 15120, while the sum is 31.

The square root of 216223357 is about 14704.5352527715. The cubic root of 216223357 is about 600.2067407926.

Adding to 216223357 its reverse (753322612), we get a palindrome (969545969).

The spelling of 216223357 in words is "two hundred sixteen million, two hundred twenty-three thousand, three hundred fifty-seven".