219387434 has 16 divisors (see below), whose sum is σ = 388225536. Its totient is φ = 90990000.

The previous prime is 219387401. The next prime is 219387463. The reversal of 219387434 is 434783912.

It is a junction number, because it is equal to n+sod(n) for n = 219387391 and 219387400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252317 + ... + 253184.

It is an arithmetic number, because the mean of its divisors is an integer number (24264096).

Almost surely, 2^219387434 is an apocalyptic number.

219387434 is a deficient number, since it is larger than the sum of its proper divisors (168838102).

219387434 is a wasteful number, since it uses less digits than its factorization.

219387434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505541.

The product of its digits is 145152, while the sum is 41.

The square root of 219387434 is about 14811.7329843607. The cubic root of 219387434 is about 603.1202581495.

The spelling of 219387434 in words is "two hundred nineteen million, three hundred eighty-seven thousand, four hundred thirty-four".