219705122940 has 48 divisors (see below), whose sum is σ = 615239413152. Its totient is φ = 58581835776.

The previous prime is 219705122863. The next prime is 219705122941. The reversal of 219705122940 is 49221507912.

219705122940 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 = 219705122892 and 219705122901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219705122941) 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, 393012 + ... + 770628.

It is an arithmetic number, because the mean of its divisors is an integer number (12817487774).

Almost surely, 2^219705122940 is an apocalyptic number.

219705122940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

219705122940 is an abundant number, since it is smaller than the sum of its proper divisors (395534290212).

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

219705122940 is a wasteful number, since it uses less digits than its factorization.

219705122940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387326 (or 387324 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 219705122940 in words is "two hundred nineteen billion, seven hundred five million, one hundred twenty-two thousand, nine hundred forty".