219780242 has 16 divisors (see below), whose sum is σ = 363204864. Its totient is φ = 98910000.

The previous prime is 219780139. The next prime is 219780257. The reversal of 219780242 is 242087912.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47234 + ... + 51677.

It is an arithmetic number, because the mean of its divisors is an integer number (22700304).

Almost surely, 2^219780242 is an apocalyptic number.

219780242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

219780242 is a deficient number, since it is larger than the sum of its proper divisors (143424622).

219780242 is a wasteful number, since it uses less digits than its factorization.

219780242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99025.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 219780242 is about 14824.9870826251. The cubic root of 219780242 is about 603.4800010396.

It can be divided in two parts, 219780 and 242, that added together give a palindrome (220022).

The spelling of 219780242 in words is "two hundred nineteen million, seven hundred eighty thousand, two hundred forty-two".