219989742 has 16 divisors (see below), whose sum is σ = 502833792. Its totient is φ = 62854200.

The previous prime is 219989719. The next prime is 219989773. The reversal of 219989742 is 247989912.

It is a congruent number.

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, 2618884 + ... + 2618967.

It is an arithmetic number, because the mean of its divisors is an integer number (31427112).

Almost surely, 2^219989742 is an apocalyptic number.

219989742 is an abundant number, since it is smaller than the sum of its proper divisors (282844050).

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

219989742 is a wasteful number, since it uses less digits than its factorization.

219989742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237863.

The product of its digits is 653184, while the sum is 51.

The square root of 219989742 is about 14832.0511730509. The cubic root of 219989742 is about 603.6716908666.

The spelling of 219989742 in words is "two hundred nineteen million, nine hundred eighty-nine thousand, seven hundred forty-two".