219540730 has 32 divisors (see below), whose sum is σ = 409795200. Its totient is φ = 84581952.

The previous prime is 219540679. The next prime is 219540731. The reversal of 219540730 is 37045912.

219540730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 219540692 and 219540701.

It is not an unprimeable number, because it can be changed into a prime (219540731) 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, 178899 + ... + 180121.

It is an arithmetic number, because the mean of its divisors is an integer number (12806100).

Almost surely, 2^219540730 is an apocalyptic number.

219540730 is a deficient number, since it is larger than the sum of its proper divisors (190254470).

219540730 is a wasteful number, since it uses less digits than its factorization.

219540730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 219540730 is about 14816.9068971901. The cubic root of 219540730 is about 603.2607013149.

The spelling of 219540730 in words is "two hundred nineteen million, five hundred forty thousand, seven hundred thirty".