216221156060 has 48 divisors (see below), whose sum is σ = 558848531136. Its totient is φ = 68430431232.

The previous prime is 216221156059. The next prime is 216221156069. The reversal of 216221156060 is 60651122612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216221156069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59399597 + ... + 59403236.

It is an arithmetic number, because the mean of its divisors is an integer number (11642677732).

Almost surely, 2^216221156060 is an apocalyptic number.

216221156060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216221156060 is an abundant number, since it is smaller than the sum of its proper divisors (342627375076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216221156060 is a wasteful number, since it uses less digits than its factorization.

216221156060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118802862 (or 118802860 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 216221156060 its reverse (60651122612), we get a palindrome (276872278672).

The spelling of 216221156060 in words is "two hundred sixteen billion, two hundred twenty-one million, one hundred fifty-six thousand, sixty".