216557743210 has 16 divisors (see below), whose sum is σ = 389812386600. Its totient is φ = 86621219776.

The previous prime is 216557743187. The next prime is 216557743217. The reversal of 216557743210 is 12347755612.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 155454352729 + 61103390481 = 394277^2 + 247191^2 .

It is a super-2 number, since 2×216557743210² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216557743217) 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, 309936 + ... + 727444.

Almost surely, 2^216557743210 is an apocalyptic number.

216557743210 is a deficient number, since it is larger than the sum of its proper divisors (173254643390).

216557743210 is a wasteful number, since it uses less digits than its factorization.

216557743210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469385.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 216557743210 in words is "two hundred sixteen billion, five hundred fifty-seven million, seven hundred forty-three thousand, two hundred ten".