216554240156 has 12 divisors (see below), whose sum is σ = 379229676840. Its totient is φ = 108202903920.

The previous prime is 216554240113. The next prime is 216554240167. The reversal of 216554240156 is 651042455612.

It is a super-3 number, since 3×216554240156³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18547475 + ... + 18559146.

It is an arithmetic number, because the mean of its divisors is an integer number (31602473070).

Almost surely, 2^216554240156 is an apocalyptic number.

It is an amenable number.

216554240156 is a deficient number, since it is larger than the sum of its proper divisors (162675436684).

216554240156 is a wasteful number, since it uses less digits than its factorization.

216554240156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37108084 (or 37108082 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

Adding to 216554240156 its reverse (651042455612), we get a palindrome (867596695768).

The spelling of 216554240156 in words is "two hundred sixteen billion, five hundred fifty-four million, two hundred forty thousand, one hundred fifty-six".