219869842 has 4 divisors (see below), whose sum is σ = 329804766. Its totient is φ = 109934920.

The previous prime is 219869833. The next prime is 219869849. The reversal of 219869842 is 248968912.

219869842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 218182441 + 1687401 = 14771^2 + 1299^2 .

It is a super-2 number, since 2×219869842² = 96685494842209928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (219869849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54967459 + ... + 54967462.

Almost surely, 2^219869842 is an apocalyptic number.

219869842 is a deficient number, since it is larger than the sum of its proper divisors (109934924).

219869842 is a wasteful number, since it uses less digits than its factorization.

219869842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109934923.

The product of its digits is 497664, while the sum is 49.

The square root of 219869842 is about 14828.0086997547. The cubic root of 219869842 is about 603.5619987983.

The spelling of 219869842 in words is "two hundred nineteen million, eight hundred sixty-nine thousand, eight hundred forty-two".